finished the lengthy lab

.idea/workspace.xml

@@ -2,15 +2,19 @@
 <project version="4">
   <component name="ChangeListManager">
     <list default="true" id="83fe4019-40e6-4a60-8c3f-69ab963507a0" name="Default Changelist" comment="">
-      <change afterPath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructors.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Students.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/ZipCodeWilmington.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/InstructorsTest.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/ZipCodeWilmingtonTest.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Educator.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestEducator.java" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/README.md" beforeDir="false" afterPath="$PROJECT_DIR$/README.md" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructor.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructor.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructors.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructors.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/People.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/People.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Person.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Person.java" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Student.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Student.java" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/StudentsTest.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/StudentsTest.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Students.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Students.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/ZipCodeWilmington.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/ZipCodeWilmington.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/PeopleTest.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/PeopleTest.java" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/ZipCodeWilmingtonTest.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/ZipCodeWilmingtonTest.java" afterDir="false" />
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     <ignored path="$PROJECT_DIR$/target/" />
     <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
@@ -23,34 +27,37 @@
     <session id="-1577179945">
       <usages-collector id="statistics.lifecycle.project">
         <counts>
-          <entry key="project.closed" value="3" />
+          <entry key="project.closed" value="5" />
           <entry key="project.open.time.0" value="1" />
-          <entry key="project.open.time.1" value="1" />
+          <entry key="project.open.time.1" value="2" />
+          <entry key="project.open.time.10" value="1" />
           <entry key="project.open.time.2" value="1" />
           <entry key="project.open.time.3" value="1" />
-          <entry key="project.opened" value="4" />
+          <entry key="project.opened" value="6" />
         </counts>
       </usages-collector>
       <usages-collector id="statistics.file.extensions.open">
         <counts>
-          <entry key="java" value="23" />
+          <entry key="java" value="53" />
+          <entry key="md" value="3" />
           <entry key="xml" value="1" />
         </counts>
       </usages-collector>
       <usages-collector id="statistics.file.types.open">
         <counts>
-          <entry key="JAVA" value="23" />
+          <entry key="JAVA" value="53" />
+          <entry key="Markdown" value="3" />
           <entry key="XML" value="1" />
         </counts>
       </usages-collector>
       <usages-collector id="statistics.file.extensions.edit">
         <counts>
-          <entry key="java" value="4694" />
+          <entry key="java" value="6066" />
         </counts>
       </usages-collector>
       <usages-collector id="statistics.file.types.edit">
         <counts>
-          <entry key="JAVA" value="4694" />
+          <entry key="JAVA" value="6066" />
         </counts>
       </usages-collector>
     </session>
@@ -58,19 +65,22 @@
   <component name="FileEditorManager">
     <leaf SIDE_TABS_SIZE_LIMIT_KEY="300">
       <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Students.java">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="435">
-              <caret line="65" column="24" lean-forward="true" selection-start-line="61" selection-start-column="7" selection-end-line="65" selection-end-column="24" />
+        <entry file="file://$PROJECT_DIR$/README.md">
+          <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
+            <state split_layout="SPLIT">
+              <first_editor relative-caret-position="379">
+                <caret line="170" lean-forward="true" selection-start-line="170" selection-end-line="170" />
+              </first_editor>
+              <second_editor />
             </state>
           </provider>
         </entry>
       </file>
-      <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/InstructorsTest.java">
+      <file pinned="false" current-in-tab="true">
+        <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestEducator.java">
           <provider selected="true" editor-type-id="text-editor">
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-              <caret line="9" column="14" lean-forward="true" selection-start-line="9" selection-start-column="14" selection-end-line="9" selection-end-column="14" />
+            <state relative-caret-position="215">
+              <caret line="33" column="16" selection-start-line="33" selection-start-column="16" selection-end-line="33" selection-end-column="16" />
               <folding>
                 <element signature="imports" expanded="true" />
               </folding>
@@ -79,32 +89,19 @@
         </entry>
       </file>
       <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructors.java">
+        <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/InstructorsTest.java">
           <provider selected="true" editor-type-id="text-editor">
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-              <folding>
-                <element signature="e#268#269#0" expanded="true" />
-                <element signature="e#298#299#0" expanded="true" />
-              </folding>
+            <state relative-caret-position="165">
+              <caret line="12" column="5" lean-forward="true" selection-start-line="12" selection-start-column="5" selection-end-line="12" selection-end-column="5" />
             </state>
           </provider>
         </entry>
       </file>
       <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructor.java">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="270">
-              <caret line="20" column="62" selection-start-line="20" selection-start-column="62" selection-end-line="20" selection-end-column="62" />
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-          </provider>
-        </entry>
-      </file>
-      <file pinned="false" current-in-tab="true">
-        <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/ZipCodeWilmingtonTest.java">
+        <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/InstructorTest.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="172">
-              <caret line="13" column="44" lean-forward="true" selection-start-line="13" selection-start-column="44" selection-end-line="13" selection-end-column="44" />
+            <state relative-caret-position="269">
+              <caret line="46" column="46" lean-forward="true" selection-start-line="37" selection-start-column="8" selection-end-line="46" selection-end-column="46" />
               <folding>
                 <element signature="imports" expanded="true" />
               </folding>
@@ -113,13 +110,19 @@
         </entry>
       </file>
       <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/ZipCodeWilmington.java">
+        <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Educator.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="232">
-              <caret line="26" column="5" lean-forward="true" selection-start-line="26" selection-start-column="5" selection-end-line="26" selection-end-column="5" />
+            <state relative-caret-position="666">
+              <caret line="45" column="5" lean-forward="true" selection-start-line="45" selection-start-column="5" selection-end-line="45" selection-end-column="5" />
               <folding>
-                <element signature="e#312#313#0" expanded="true" />
-                <element signature="e#342#343#0" expanded="true" />
+                <element signature="e#629#630#0" expanded="true" />
+                <element signature="e#662#663#0" expanded="true" />
+                <element signature="e#714#715#0" expanded="true" />
+                <element signature="e#758#759#0" expanded="true" />
+                <element signature="e#1119#1120#0" expanded="true" />
+                <element signature="e#1144#1145#0" expanded="true" />
+                <element signature="e#1175#1176#0" expanded="true" />
+                <element signature="e#1202#1203#0" expanded="true" />
               </folding>
             </state>
           </provider>
@@ -131,6 +134,7 @@
     <option name="RECENT_TEMPLATES">
       <list>
         <option value="Interface" />
+        <option value="Enum" />
         <option value="Class" />
       </list>
     </option>
@@ -154,20 +158,23 @@
         <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/TestStudent.java" />
         <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Teacher.java" />
         <option value="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/InstructorTest.java" />
-        <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Person.java" />
-        <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/People.java" />
-        <option value="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/PeopleTest.java" />
-        <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Student.java" />
-        <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Students.java" />
         <option value="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/StudentsTest.java" />
         <option value="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/InstructorsTest.java" />
-        <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructors.java" />
-        <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructor.java" />
         <option value="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/ZipcodeTes.java" />
         <option value="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/ZipcodeTest.java" />
         <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/ZipcodeWilmington.java" />
         <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/ZipCodeWilmington.java" />
+        <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Person.java" />
+        <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructor.java" />
+        <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Student.java" />
         <option value="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/ZipCodeWilmingtonTest.java" />
+        <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/People.java" />
+        <option value="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/PeopleTest.java" />
+        <option value="$PROJECT_DIR$/README.md" />
+        <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Students.java" />
+        <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructors.java" />
+        <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Educator.java" />
+        <option value="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestEducator.java" />
       </list>
     </option>
   </component>
@@ -188,23 +195,6 @@
       <foldersAlwaysOnTop value="true" />
     </navigator>
     <panes>
-      <pane id="PackagesPane">
-        <subPane>
-          <expand>
-            <path>
-              <item name="interfaces-1" type="58d84e3e:PackageViewProjectNode" />
-              <item name="interfaces-1" type="616d4139:PackageViewModuleNode" />
-            </path>
-            <path>
-              <item name="interfaces-1" type="58d84e3e:PackageViewProjectNode" />
-              <item name="interfaces-1" type="616d4139:PackageViewModuleNode" />
-              <item name="io.zipcoder.interfaces" type="1f31426a:PackageElementNode" />
-            </path>
-          </expand>
-          <select />
-        </subPane>
-      </pane>
-      <pane id="ProjectPane" />
       <pane id="Scope">
         <subPane subId="Scope 'Project Files'; set:Project Files; class com.intellij.psi.search.scope.ProjectFilesScope">
           <expand>
@@ -301,18 +291,35 @@
           <select />
         </subPane>
       </pane>
+      <pane id="PackagesPane">
+        <subPane>
+          <expand>
+            <path>
+              <item name="interfaces-1" type="58d84e3e:PackageViewProjectNode" />
+              <item name="interfaces-1" type="616d4139:PackageViewModuleNode" />
+            </path>
+            <path>
+              <item name="interfaces-1" type="58d84e3e:PackageViewProjectNode" />
+              <item name="interfaces-1" type="616d4139:PackageViewModuleNode" />
+              <item name="io.zipcoder.interfaces" type="1f31426a:PackageElementNode" />
+            </path>
+          </expand>
+          <select />
+        </subPane>
+      </pane>
+      <pane id="ProjectPane" />
     </panes>
   </component>
   <component name="PropertiesComponent">
     <property name="WebServerToolWindowFactoryState" value="false" />
     <property name="aspect.path.notification.shown" value="true" />
-    <property name="com.android.tools.idea.instantapp.provision.ProvisionBeforeRunTaskProvider.myTimeStamp" value="1541301176729" />
+    <property name="com.android.tools.idea.instantapp.provision.ProvisionBeforeRunTaskProvider.myTimeStamp" value="1541563367948" />
     <property name="last_directory_selection" value="$PROJECT_DIR$/src/test/java" />
     <property name="last_opened_file_path" value="$PROJECT_DIR$" />
     <property name="nodejs_interpreter_path.stuck_in_default_project" value="undefined stuck path" />
     <property name="nodejs_npm_path_reset_for_default_project" value="true" />
     <property name="project.structure.last.edited" value="Project" />
-    <property name="project.structure.proportion" value="0.0" />
+    <property name="project.structure.proportion" value="0.15" />
     <property name="project.structure.side.proportion" value="0.0" />
     <property name="settings.editor.selected.configurable" value="reference.projectsettings.compiler.javacompiler" />
   </component>
@@ -336,7 +343,7 @@
       </list>
     </option>
   </component>
-  <component name="RunManager" selected="JUnit.ZipCodeWilmingtonTest.testHostLecture">
+  <component name="RunManager" selected="JUnit.TestEducator.setGetTimeWorkedout">
     <configuration name="InstructorsTest" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
       <module name="interfaces-1" />
       <extension name="coverage">
@@ -351,7 +358,7 @@
         <option name="Make" enabled="true" />
       </method>
     </configuration>
-    <configuration name="StudentsTest" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+    <configuration name="TestEducator.setGetTimeWorkedout" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
       <module name="interfaces-1" />
       <extension name="coverage">
         <pattern>
@@ -360,12 +367,14 @@
         </pattern>
       </extension>
       <option name="PACKAGE_NAME" value="io.zipcoder.interfaces" />
-      <option name="MAIN_CLASS_NAME" value="io.zipcoder.interfaces.StudentsTest" />
+      <option name="MAIN_CLASS_NAME" value="io.zipcoder.interfaces.TestEducator" />
+      <option name="METHOD_NAME" value="setGetTimeWorkedout" />
+      <option name="TEST_OBJECT" value="method" />
       <method v="2">
         <option name="Make" enabled="true" />
       </method>
     </configuration>
-    <configuration name="StudentsTest.testInitializationSetupStudents" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+    <configuration name="TestEducator.testImplementation" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
       <module name="interfaces-1" />
       <extension name="coverage">
         <pattern>
@@ -374,14 +383,14 @@
         </pattern>
       </extension>
       <option name="PACKAGE_NAME" value="io.zipcoder.interfaces" />
-      <option name="MAIN_CLASS_NAME" value="io.zipcoder.interfaces.StudentsTest" />
-      <option name="METHOD_NAME" value="testInitializationSetupStudents" />
+      <option name="MAIN_CLASS_NAME" value="io.zipcoder.interfaces.TestEducator" />
+      <option name="METHOD_NAME" value="testImplementation" />
       <option name="TEST_OBJECT" value="method" />
       <method v="2">
         <option name="Make" enabled="true" />
       </method>
     </configuration>
-    <configuration name="StudentsTest.testSingletonInstance" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+    <configuration name="TestEducator.testLecture" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
       <module name="interfaces-1" />
       <extension name="coverage">
         <pattern>
@@ -390,14 +399,14 @@
         </pattern>
       </extension>
       <option name="PACKAGE_NAME" value="io.zipcoder.interfaces" />
-      <option name="MAIN_CLASS_NAME" value="io.zipcoder.interfaces.StudentsTest" />
-      <option name="METHOD_NAME" value="testSingletonInstance" />
+      <option name="MAIN_CLASS_NAME" value="io.zipcoder.interfaces.TestEducator" />
+      <option name="METHOD_NAME" value="testLecture" />
       <option name="TEST_OBJECT" value="method" />
       <method v="2">
         <option name="Make" enabled="true" />
       </method>
     </configuration>
-    <configuration name="ZipCodeWilmingtonTest.testHostLecture" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+    <configuration name="TestEducator.testTeach" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
       <module name="interfaces-1" />
       <extension name="coverage">
         <pattern>
@@ -406,27 +415,27 @@
         </pattern>
       </extension>
       <option name="PACKAGE_NAME" value="io.zipcoder.interfaces" />
-      <option name="MAIN_CLASS_NAME" value="io.zipcoder.interfaces.ZipCodeWilmingtonTest" />
-      <option name="METHOD_NAME" value="testHostLecture" />
+      <option name="MAIN_CLASS_NAME" value="io.zipcoder.interfaces.TestEducator" />
+      <option name="METHOD_NAME" value="testTeach" />
       <option name="TEST_OBJECT" value="method" />
       <method v="2">
         <option name="Make" enabled="true" />
       </method>
     </configuration>
     <list>
-      <item itemvalue="JUnit.StudentsTest.testSingletonInstance" />
-      <item itemvalue="JUnit.StudentsTest" />
-      <item itemvalue="JUnit.StudentsTest.testInitializationSetupStudents" />
       <item itemvalue="JUnit.InstructorsTest" />
-      <item itemvalue="JUnit.ZipCodeWilmingtonTest.testHostLecture" />
+      <item itemvalue="JUnit.TestEducator.testImplementation" />
+      <item itemvalue="JUnit.TestEducator.testTeach" />
+      <item itemvalue="JUnit.TestEducator.testLecture" />
+      <item itemvalue="JUnit.TestEducator.setGetTimeWorkedout" />
     </list>
     <recent_temporary>
       <list>
-        <item itemvalue="JUnit.ZipCodeWilmingtonTest.testHostLecture" />
+        <item itemvalue="JUnit.TestEducator.setGetTimeWorkedout" />
+        <item itemvalue="JUnit.TestEducator.testLecture" />
+        <item itemvalue="JUnit.TestEducator.testTeach" />
+        <item itemvalue="JUnit.TestEducator.testImplementation" />
         <item itemvalue="JUnit.InstructorsTest" />
-        <item itemvalue="JUnit.StudentsTest.testInitializationSetupStudents" />
-        <item itemvalue="JUnit.StudentsTest.testSingletonInstance" />
-        <item itemvalue="JUnit.StudentsTest" />
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     </recent_temporary>
   </component>
@@ -443,50 +452,61 @@
       <workItem from="1541270014828" duration="11000" />
       <workItem from="1541270109939" duration="23000" />
       <workItem from="1541270169117" duration="8035000" />
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+      <workItem from="1541289104921" duration="9456000" />
+      <workItem from="1541424585540" duration="225000" />
+      <workItem from="1541461683103" duration="18492000" />
     </task>
     <servers />
   </component>
   <component name="TestHistory">
-    <history-entry file="PeopleTest_testFindById - 2018.11.03 at 16h 34m 14s.xml">
-      <configuration name="PeopleTest.testFindById" configurationId="JUnit" />
+    <history-entry file="PeopleTest - 2018.11.06 at 22h 04m 06s.xml">
+      <configuration name="PeopleTest" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="PeopleTest_testGetArray - 2018.11.03 at 16h 53m 49s.xml">
-      <configuration name="PeopleTest.testGetArray" configurationId="JUnit" />
+    <history-entry file="PeopleTest - 2018.11.06 at 22h 05m 12s.xml">
+      <configuration name="PeopleTest" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="PeopleTest_testRemoveAll - 2018.11.03 at 16h 57m 53s.xml">
-      <configuration name="PeopleTest.testRemoveAll" configurationId="JUnit" />
+    <history-entry file="PeopleTest - 2018.11.06 at 22h 12m 39s.xml">
+      <configuration name="PeopleTest" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="StudentsTest_testSingletonInstance - 2018.11.03 at 21h 24m 50s.xml">
-      <configuration name="StudentsTest.testSingletonInstance" configurationId="JUnit" />
-    </history-entry>
-    <history-entry file="StudentsTest - 2018.11.03 at 21h 28m 03s.xml">
+    <history-entry file="StudentsTest - 2018.11.06 at 22h 19m 04s.xml">
       <configuration name="StudentsTest" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="StudentsTest - 2018.11.03 at 21h 28m 35s.xml">
-      <configuration name="StudentsTest" configurationId="JUnit" />
+    <history-entry file="InstructorsTest - 2018.11.06 at 22h 19m 22s.xml">
+      <configuration name="InstructorsTest" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="StudentsTest_testSingletonInstance - 2018.11.03 at 21h 34m 14s.xml">
-      <configuration name="StudentsTest.testSingletonInstance" configurationId="JUnit" />
+    <history-entry file="ZipCodeWilmingtonTest - 2018.11.06 at 22h 19m 31s.xml">
+      <configuration name="ZipCodeWilmingtonTest" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="StudentsTest_testInitializationSetupStudents - 2018.11.03 at 21h 55m 38s.xml">
-      <configuration name="StudentsTest.testInitializationSetupStudents" configurationId="JUnit" />
+    <history-entry file="InstructorsTest - 2018.11.06 at 22h 41m 55s.xml">
+      <configuration name="InstructorsTest" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="InstructorsTest - 2018.11.03 at 22h 02m 25s.xml">
+    <history-entry file="InstructorsTest - 2018.11.06 at 22h 47m 39s.xml">
       <configuration name="InstructorsTest" configurationId="JUnit" />
     </history-entry>
-    <history-entry file="ZipCodeWilmingtonTest_testHostLecture - 2018.11.03 at 22h 58m 17s.xml">
-      <configuration name="ZipCodeWilmingtonTest.testHostLecture" configurationId="JUnit" />
+    <history-entry file="TestEducator_testImplementation - 2018.11.06 at 22h 56m 41s.xml">
+      <configuration name="TestEducator.testImplementation" configurationId="JUnit" />
+    </history-entry>
+    <history-entry file="TestEducator_testTeach - 2018.11.06 at 22h 59m 15s.xml">
+      <configuration name="TestEducator.testTeach" configurationId="JUnit" />
     </history-entry>
   </component>
   <component name="TimeTrackingManager">
-    <option name="totallyTimeSpent" value="17202000" />
+    <option name="totallyTimeSpent" value="36242000" />
+  </component>
+  <component name="TodoView">
+    <todo-panel id="selected-file">
+      <is-autoscroll-to-source value="true" />
+    </todo-panel>
+    <todo-panel id="all">
+      <are-packages-shown value="true" />
+      <is-autoscroll-to-source value="true" />
+    </todo-panel>
   </component>
   <component name="ToolWindowManager">
-    <frame x="0" y="23" width="1280" height="709" extended-state="6" />
+    <frame x="0" y="23" width="1280" height="709" extended-state="0" />
     <editor active="true" />
     <layout>
-      <window_info content_ui="combo" id="Project" order="0" visible="true" weight="0.25767368" />
+      <window_info content_ui="combo" id="Project" order="0" visible="true" weight="0.10016155" />
       <window_info id="Structure" order="1" side_tool="true" weight="0.25" />
       <window_info id="Image Layers" order="2" />
       <window_info id="Designer" order="3" />
@@ -495,14 +515,14 @@
       <window_info id="Favorites" order="6" side_tool="true" />
       <window_info anchor="bottom" id="Message" order="0" />
       <window_info anchor="bottom" id="Find" order="1" />
-      <window_info active="true" anchor="bottom" id="Run" order="2" visible="true" weight="0.32901135" />
+      <window_info active="true" anchor="bottom" id="Run" order="2" sideWeight="0.49919224" visible="true" weight="0.32901135" />
       <window_info anchor="bottom" id="Debug" order="3" weight="0.3987034" />
       <window_info anchor="bottom" id="Cvs" order="4" weight="0.25" />
       <window_info anchor="bottom" id="Inspection" order="5" weight="0.4" />
-      <window_info anchor="bottom" id="TODO" order="6" />
+      <window_info anchor="bottom" id="TODO" order="6" sideWeight="0.49919224" weight="0.32901135" />
       <window_info anchor="bottom" id="Database Changes" order="7" show_stripe_button="false" />
-      <window_info anchor="bottom" id="Terminal" order="8" weight="0.32901135" />
-      <window_info anchor="bottom" id="Event Log" order="9" side_tool="true" />
+      <window_info anchor="bottom" id="Terminal" order="8" sideWeight="0.4983845" weight="0.32901135" />
+      <window_info anchor="bottom" id="Event Log" order="9" sideWeight="0.5016155" side_tool="true" weight="0.32901135" />
       <window_info anchor="bottom" id="Version Control" order="10" show_stripe_button="false" />
       <window_info anchor="bottom" id="Messages" order="11" weight="0.32901135" />
       <window_info anchor="right" id="Commander" internal_type="SLIDING" order="0" type="SLIDING" weight="0.4" />
@@ -516,7 +536,7 @@
       <window_info anchor="right" id="Maven Projects" order="8" />
     </layout>
     <layout-to-restore>
-      <window_info content_ui="combo" id="Project" order="0" visible="true" weight="0.25767368" />
+      <window_info content_ui="combo" id="Project" order="0" visible="true" weight="0.12520194" />
       <window_info id="Structure" order="1" side_tool="true" weight="0.25" />
       <window_info id="Image Layers" order="2" />
       <window_info id="Designer" order="3" />
@@ -525,14 +545,14 @@
       <window_info id="Favorites" order="6" side_tool="true" />
       <window_info anchor="bottom" id="Message" order="0" />
       <window_info anchor="bottom" id="Find" order="1" />
-      <window_info active="true" anchor="bottom" id="Run" order="2" visible="true" weight="0.32901135" />
+      <window_info active="true" anchor="bottom" id="Run" order="2" sideWeight="0.49919224" visible="true" weight="0.32901135" />
       <window_info anchor="bottom" id="Debug" order="3" weight="0.3987034" />
       <window_info anchor="bottom" id="Cvs" order="4" weight="0.25" />
       <window_info anchor="bottom" id="Inspection" order="5" weight="0.4" />
-      <window_info anchor="bottom" id="TODO" order="6" />
+      <window_info anchor="bottom" id="TODO" order="6" sideWeight="0.49919224" weight="0.32901135" />
       <window_info anchor="bottom" id="Database Changes" order="7" show_stripe_button="false" />
-      <window_info anchor="bottom" id="Terminal" order="8" weight="0.32901135" />
-      <window_info anchor="bottom" id="Event Log" order="9" side_tool="true" />
+      <window_info anchor="bottom" id="Terminal" order="8" sideWeight="0.4983845" weight="0.32901135" />
+      <window_info anchor="bottom" id="Event Log" order="9" sideWeight="0.5016155" side_tool="true" weight="0.32901135" />
       <window_info anchor="bottom" id="Version Control" order="10" show_stripe_button="false" />
       <window_info anchor="bottom" id="Messages" order="11" weight="0.32901135" />
       <window_info anchor="right" id="Commander" internal_type="SLIDING" order="0" type="SLIDING" weight="0.4" />
@@ -564,11 +584,6 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="60">
           <caret line="4" column="22" selection-start-line="2" selection-end-line="4" selection-end-column="22" />
-          <folding>
-            <element signature="imports" expanded="true" />
-            <element signature="e#187#188#0" expanded="true" />
-            <element signature="e#223#224#0" expanded="true" />
-          </folding>
         </state>
       </provider>
     </entry>
@@ -579,13 +594,15 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Person.java">
+    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestStudent.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="120">
-          <caret line="12" column="5" selection-start-line="12" selection-start-column="5" selection-end-line="12" selection-end-column="5" />
+        <state relative-caret-position="360">
+          <caret line="26" column="17" selection-start-line="26" selection-start-column="17" selection-end-line="26" selection-end-column="17" />
         </state>
       </provider>
     </entry>
+    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/ZipcodeTes.java" />
+    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/ZipcodeTest.java" />
     <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Teacher.java">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="60">
@@ -593,48 +610,43 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/InstructorTest.java">
+    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Person.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="600">
-          <caret line="42" column="43" selection-start-line="42" selection-start-column="43" selection-end-line="42" selection-end-column="43" />
-          <folding>
-            <element signature="imports" expanded="true" />
-          </folding>
+        <state relative-caret-position="45">
+          <caret line="3" column="12" selection-start-line="3" selection-start-column="12" selection-end-line="3" selection-end-column="12" />
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/People.java">
+    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructor.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="915">
-          <caret line="63" column="50" selection-start-line="63" selection-start-column="50" selection-end-line="63" selection-end-column="50" />
-          <folding>
-            <element signature="e#139#140#0" expanded="true" />
-            <element signature="e#191#192#0" expanded="true" />
-            <element signature="e#230#231#0" expanded="true" />
-            <element signature="e#268#269#0" expanded="true" />
-            <element signature="e#1219#1220#0" expanded="true" />
-            <element signature="e#1276#1277#0" expanded="true" />
-          </folding>
+        <state relative-caret-position="165">
+          <caret line="11" column="24" lean-forward="true" selection-start-line="11" selection-start-column="24" selection-end-line="11" selection-end-column="24" />
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestStudent.java">
+    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Student.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="360">
-          <caret line="26" column="17" selection-start-line="26" selection-start-column="17" selection-end-line="26" selection-end-column="17" />
+        <state relative-caret-position="345">
+          <caret line="27" column="55" selection-start-line="27" selection-start-column="55" selection-end-line="27" selection-end-column="55" />
           <folding>
-            <element signature="imports" expanded="true" />
+            <element signature="e#191#192#0" expanded="true" />
+            <element signature="e#225#226#0" expanded="true" />
+            <element signature="e#654#655#0" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/PeopleTest.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="247">
-          <caret line="77" column="5" selection-start-line="77" selection-start-column="5" selection-end-line="77" selection-end-column="5" />
-          <folding>
-            <element signature="imports" expanded="true" />
-          </folding>
+        <state relative-caret-position="60">
+          <caret line="4" column="22" lean-forward="true" selection-start-line="4" selection-start-column="22" selection-end-line="4" selection-end-column="22" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Students.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="60">
+          <caret line="4" column="51" selection-start-line="4" selection-start-column="51" selection-end-line="4" selection-end-column="51" />
         </state>
       </provider>
     </entry>
@@ -648,81 +660,85 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Student.java">
+    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/ZipCodeWilmingtonTest.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state>
-          <caret column="31" lean-forward="true" selection-start-column="31" selection-end-column="31" />
+        <state relative-caret-position="210">
+          <caret line="14" column="13" lean-forward="true" selection-start-line="14" selection-start-column="13" selection-end-line="14" selection-end-column="13" />
           <folding>
-            <element signature="e#145#146#0" expanded="true" />
-            <element signature="e#179#180#0" expanded="true" />
+            <element signature="imports" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/InstructorsTest.java">
+    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructors.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="135">
-          <caret line="9" column="14" lean-forward="true" selection-start-line="9" selection-start-column="14" selection-end-line="9" selection-end-column="14" />
-          <folding>
-            <element signature="imports" expanded="true" />
-          </folding>
+        <state relative-caret-position="150">
+          <caret line="10" column="37" lean-forward="true" selection-start-line="10" selection-start-column="37" selection-end-line="10" selection-end-column="37" />
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Students.java">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="435">
-          <caret line="65" column="24" lean-forward="true" selection-start-line="61" selection-start-column="7" selection-end-line="65" selection-end-column="24" />
+    <entry file="file://$PROJECT_DIR$/README.md">
+      <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
+        <state split_layout="SPLIT">
+          <first_editor relative-caret-position="379">
+            <caret line="170" lean-forward="true" selection-start-line="170" selection-end-line="170" />
+          </first_editor>
+          <second_editor />
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/ZipcodeTes.java">
+    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/ZipCodeWilmington.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="30">
-          <caret line="2" column="25" lean-forward="true" selection-start-line="2" selection-start-column="25" selection-end-line="2" selection-end-column="25" />
+        <state relative-caret-position="315">
+          <caret line="23" column="49" selection-start-line="23" selection-start-column="49" selection-end-line="23" selection-end-column="49" />
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/ZipcodeTest.java">
+    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/People.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="60">
-          <caret line="4" column="4" selection-start-line="4" selection-start-column="4" selection-end-line="4" selection-end-column="4" />
+        <state relative-caret-position="233">
+          <caret line="76" column="19" selection-start-line="76" selection-start-column="19" selection-end-line="76" selection-end-column="19" />
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructor.java">
+    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/InstructorsTest.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="270">
-          <caret line="20" column="62" selection-start-line="20" selection-start-column="62" selection-end-line="20" selection-end-column="62" />
+        <state relative-caret-position="165">
+          <caret line="12" column="5" lean-forward="true" selection-start-line="12" selection-start-column="5" selection-end-line="12" selection-end-column="5" />
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructors.java">
+    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Educator.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="210">
-          <caret line="15" column="49" lean-forward="true" selection-start-line="15" selection-start-column="49" selection-end-line="15" selection-end-column="49" />
+        <state relative-caret-position="666">
+          <caret line="45" column="5" lean-forward="true" selection-start-line="45" selection-start-column="5" selection-end-line="45" selection-end-column="5" />
           <folding>
-            <element signature="e#268#269#0" expanded="true" />
-            <element signature="e#298#299#0" expanded="true" />
+            <element signature="e#629#630#0" expanded="true" />
+            <element signature="e#662#663#0" expanded="true" />
+            <element signature="e#714#715#0" expanded="true" />
+            <element signature="e#758#759#0" expanded="true" />
+            <element signature="e#1119#1120#0" expanded="true" />
+            <element signature="e#1144#1145#0" expanded="true" />
+            <element signature="e#1175#1176#0" expanded="true" />
+            <element signature="e#1202#1203#0" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/ZipCodeWilmington.java">
+    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/InstructorTest.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="232">
-          <caret line="26" column="5" lean-forward="true" selection-start-line="26" selection-start-column="5" selection-end-line="26" selection-end-column="5" />
+        <state relative-caret-position="269">
+          <caret line="46" column="46" lean-forward="true" selection-start-line="37" selection-start-column="8" selection-end-line="46" selection-end-column="46" />
           <folding>
-            <element signature="e#312#313#0" expanded="true" />
-            <element signature="e#342#343#0" expanded="true" />
+            <element signature="imports" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/ZipCodeWilmingtonTest.java">
+    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestEducator.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="172">
-          <caret line="13" column="44" lean-forward="true" selection-start-line="13" selection-start-column="44" selection-end-line="13" selection-end-column="44" />
+        <state relative-caret-position="215">
+          <caret line="33" column="16" selection-start-line="33" selection-start-column="16" selection-end-line="33" selection-end-column="16" />
           <folding>
             <element signature="imports" expanded="true" />
           </folding>

README.md

@@ -147,7 +147,7 @@
 ### Part 10.3 - Refactor `ZipCodeWilmington` class
 * Refactor the `hostLecture` method in the `ZipCodeWilmington` class by removing any intermediate _casting trick(s)_.
 
--
+-E[] array = (E[]) Array.newInstance(Student[].class.getComponentType(), list.size());
 ### Part 10.4 - Test refactored classes.
 * Ensure that the `StudentsTest`, `InstructorsTest`, `PeopleTest`, `ZipCodeWilmingtonTest` classes were not affected by the refactor.
 

src/main/java/io/zipcoder/interfaces/Educator.java

@@ -0,0 +1,51 @@
+package io.zipcoder.interfaces;
+
+public enum Educator implements Teacher{
+        KRIS(40,"Kris Younger"),
+        FROILAN(41, "Froilan"),
+        DOLIO(42, "Dolio"),
+        LEON(43, "Leon"),
+        WILLHEM(44, "Willhem"),
+        NHYU(45, "Nhyu");
+
+    private int id;
+    private String name;
+    private double timeWorked;
+
+    Educator(int id, String name){
+        this.id = id;
+        this.name = name;
+        this.timeWorked = 0;
+    }
+
+    public void teach(Learner learner, double numberOfHours) {
+        learner.learn(numberOfHours);
+        setTimeWorked(getTimeWorked() + numberOfHours);
+    }
+
+    public void lecture(Learner[] learners, double numberOfHours) {
+
+        for (Learner learner : learners) {
+            double numberOfHoursPerLearner = (numberOfHours / learners.length);
+            learner.learn(numberOfHoursPerLearner);
+        }
+        setTimeWorked(getTimeWorked() + numberOfHours);
+
+    }
+
+    public double getTimeWorked() {
+        return timeWorked;
+    }
+
+    public void setTimeWorked(double timeWorked) {
+        this.timeWorked = timeWorked;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+}

src/main/java/io/zipcoder/interfaces/Instructor.java

@@ -2,15 +2,16 @@ package io.zipcoder.interfaces;
 
 public class Instructor extends Person implements Teacher {
 
-    private int id;
+    private long id;
 
     public Instructor() {
 
     }
 
-    public Instructor(int id, String name) {
-        this.id = id;
-        this.name = name;
+    public Instructor(long id, String name) {
+        super(id, name);
+//        this.id = id;
+//        this.name = name;
     }
 
     public void teach(Learner learner, double numberOfHours) {

src/main/java/io/zipcoder/interfaces/Instructors.java

@@ -2,7 +2,7 @@ package io.zipcoder.interfaces;
 
 import java.util.ArrayList;
 
-public final class Instructors {
+public final class Instructors extends People<Instructor>{
 
     private static final Instructors instance;
     private ArrayList<Instructor> instructorsList;

src/main/java/io/zipcoder/interfaces/People.java

@@ -2,24 +2,25 @@ package io.zipcoder.interfaces;
 
 import java.util.ArrayList;
 
-public class People {
-    ArrayList<Person> personList;
+public abstract class People <E extends Person>{
+
+    ArrayList<E> personList;
 
     public People() {
-        personList = new ArrayList<Person>();
+        personList = new ArrayList<E>();
     }
 
 
-    public void add(Person person) {
+    public void add(E person) {
         personList.add(person);
     }
 
-    public ArrayList<Person> getPersonList() {
+    public ArrayList<E> getPersonList() {
         return this.personList;
     }
 
     public void remove(Person person) {
-        for(Person p : personList){
+        for(E p : personList){
             if(!p.equals(person))
             {
             }
@@ -29,8 +30,8 @@ public class People {
 
     public void removeById(long id){
 
-        Person person = null;
-        for(Person p : personList){
+        E person = null;
+        for(E p : personList){
             person = p;
             if(p.getId() != id)
             {
@@ -43,6 +44,7 @@ public class People {
     public Person findById(int id) {
 
         for(Person p : personList){
+
             if(p.getId() == id)
             {
                 return p;
@@ -52,15 +54,29 @@ public class People {
     }
 
 
-    public Person[] getArray() {
+    public abstract E[] getArray(); /*{
         Person[] people = new Person[20];
         for(int i =0;i<personList.size();i++){
             people[i]= personList.get(i);
         }
         return people;
-    }
+    }*/
 
     public void removeAll() {
-        this.personList = new ArrayList<Person>();
+        this.personList = new ArrayList<E>();
     }
+
+    public static class subClass extends People{
+
+
+        public Person[] getArray() {
+            Person[] people = new Person[20];
+            for(int i =0;i<personList.size();i++){
+                people[i]= (Person)personList.get(i);
+            }
+            return people;
+
+        }
+    }
+
 }

src/main/java/io/zipcoder/interfaces/Person.java

@@ -1,11 +1,16 @@
 package io.zipcoder.interfaces;
 
 public class Person {
-    private static long id = 0;
+    private long id;
     String name;
 
-    public Person() {
-        this.id += 1;
+    public Person(){
+
+    }
+
+    public Person(long id, String name) {
+        this.id = id;
+        this.name = name;
     }
 
     public long getId() {

src/main/java/io/zipcoder/interfaces/Student.java

@@ -3,16 +3,17 @@ package io.zipcoder.interfaces;
 public class Student extends Person implements Learner {
 
     private int totalStudyTime;
-    private int id;
+    private long id;
     private String name;
 
     public Student() {
         totalStudyTime = 0;
     }
 
-    public Student(int id, String name) {
+    public Student(long id, String name) {
         this.id = id;
         this.name = name;
+        totalStudyTime = 0;
     }
 
     public void learn(double numberOfHours) {
@@ -24,6 +25,10 @@ public class Student extends Person implements Learner {
         return this.totalStudyTime + hours;
     }
 
+    public void setTotalStudyTime(int totalStudyTime) {
+        this.totalStudyTime = totalStudyTime;
+    }
+
     public int getTotalStudyTime() {
         return this.totalStudyTime;
     }

src/main/java/io/zipcoder/interfaces/Students.java

@@ -2,7 +2,7 @@ package io.zipcoder.interfaces;
 
 import java.util.ArrayList;
 
-public final class Students {
+public final class Students extends People<Student>{
 
     private static final Students instance;
     private ArrayList<Student> studentList;

src/main/java/io/zipcoder/interfaces/ZipCodeWilmington.java

@@ -26,4 +26,18 @@ public final class ZipCodeWilmington {
         teacher.lecture(studentsArr, numberOfHours);
     }
 
+    public void hostLecture(long id, double numberOfHours){
+
+        Instructor[] instructorArr = instructors.getArray();
+
+        for(Instructor instructor : instructorArr){
+            System.out.println(instructor.getId());
+            System.out.println(instructor.getName());
+            if(instructor.getId() == id)
+            {
+                instructor.lecture(students.getArray(), numberOfHours);
+            }
+        }
+
+    }
 }

src/test/java/io/zipcoder/interfaces/PeopleTest.java

@@ -1,5 +1,6 @@
 package io.zipcoder.interfaces;
 
+import io.zipcoder.interfaces.People.subClass;
 import org.junit.Assert;
 import org.junit.Test;
 
@@ -9,7 +10,7 @@ public class PeopleTest {
 
     @Test
     public void testAdd(){
-        People people = new People();
+        People people = new subClass();
         Person person = new Person();
         people.add(person);
         ArrayList<Person> personList = people.getPersonList();
@@ -20,7 +21,7 @@ public class PeopleTest {
     @Test
     public void testRemoveByPerson(){
         Person person = new Person();
-        People people = new People();
+        People people = new subClass();
         people.add(person);
         people.remove(person);
 
@@ -30,7 +31,7 @@ public class PeopleTest {
     @Test
     public void testRemoveById(){
         Person person = new Person();
-        People people = new People();
+        People people = new subClass();
         people.add(person);
         people.removeById(1);
         Assert.assertEquals(0, people.personList.size());
@@ -38,8 +39,8 @@ public class PeopleTest {
 
     @Test
     public void testFindById(){
-        Person person = new Person();
-        People people = new People();
+        Person person = new Person(1,"xyz");
+        People people = new subClass();
         people.add(person);
         Person actualPerson = people.findById(1);
         Assert.assertEquals(person, actualPerson);
@@ -50,7 +51,7 @@ public class PeopleTest {
         boolean expected = true;
         Person person = new Person();
         Person person2 = new Person();
-        People people = new People();
+        People people = new subClass();
         people.add(person);
         people.add(person2);
         boolean actual = true;
@@ -68,7 +69,7 @@ public class PeopleTest {
     public void testRemoveAll(){
         Person person = new Person();
         Person person2 = new Person();
-        People people = new People();
+        People people = new subClass();
         people.add(person);
         people.add(person2);
 

src/test/java/io/zipcoder/interfaces/TestEducator.java

@@ -0,0 +1,45 @@
+package io.zipcoder.interfaces;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class TestEducator {
+
+    @Test
+    public void testImplementation(){
+        Educator educator = Educator.DOLIO;
+
+        Assert.assertTrue(educator instanceof Teacher);
+    }
+    @Test
+    public void testTeach(){
+        Educator educator = Educator.DOLIO;
+        Student student = new Student();
+        int expected = 5;
+        educator.teach(student, 5);
+        int actual = student.getTotalStudyTime();
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void testLecture(){
+        Educator educator = Educator.FROILAN;
+        int expected = 2;
+        Student student1 = new Student();
+        Student student2 = new Student();
+        Student student3 = new Student();
+
+        Learner[] learners = new Student[]{student1,student2,student3};
+
+        educator.lecture(learners, 6);
+        int actual = student1.getTotalStudyTime();
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void setGetTimeWorkedout(){
+        Educator educator = Educator.KRIS;
+        educator.setTimeWorked(20.0);
+        Assert.assertEquals(20.0, educator.getTimeWorked(),0.5);
+    }
+}

src/test/java/io/zipcoder/interfaces/ZipCodeWilmingtonTest.java

@@ -10,11 +10,33 @@ public class ZipCodeWilmingtonTest {
             Students students = Students.getInstance();
             Teacher teacher = new Instructor();
             ZipCodeWilmington zipcode = ZipCodeWilmington.getInstance();
+            for(Student student : students.getArray()){
+                student.setTotalStudyTime(0);
+            }
 
-            zipcode.hostLecture(teacher, 2);
+            zipcode.hostLecture(teacher, 78);
 
             Student[] studentsArr = students.getArray();
-            Assert.assertTrue(studentsArr[0].getTotalStudyTime() == 2);
+            Assert.assertEquals(2,studentsArr[0].getTotalStudyTime());
+    }
+
+    @Test
+    public void testHostLecture2(){
+
+            Students students = Students.getInstance();
+            //Teacher teacher = new Instructor();
+            ZipCodeWilmington zipcode = ZipCodeWilmington.getInstance();
+
+
+
+            Student[] studentsArr = students.getArray();
+
+            /*for (Student student : studentsArr) {
+                System.out.println(student.getTotalStudyTime());
+            }*/
+
+            zipcode.hostLecture(5, 78);
+            Assert.assertEquals(2, studentsArr[0].getTotalStudyTime());
     }