Rolled back to before 10 becuase I broke everything; now reaching step 10 again

.idea/workspace.xml

 <project version="4">
   <component name="ChangeListManager">
     <list default="true" id="8e76a78c-7b87-4795-997f-dbd651047f5b" name="Default Changelist" comment="">
-      <change afterPath="$PROJECT_DIR$/.idea/compiler.xml" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/.idea/encodings.xml" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/.idea/libraries/Maven__junit_junit_4_12.xml" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/.idea/libraries/Maven__org_hamcrest_hamcrest_core_1_3.xml" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/.idea/misc.xml" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/.idea/modules.xml" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/.idea/vcs.xml" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/interfaces-1.iml" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructor.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructors.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Learner.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/People.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Student.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/Teacher.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/InstructorTest.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/PeopleTest.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/StudentsTest.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestStudent.java" afterDir="false" />
-      <change afterPath="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/ZipCodeWilmingtonTest.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/test/java/io/zipcoder/interfaces/TestPerson.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestPerson.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/ZipCodeWilmington.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" />
     </list>
     <ignored path="$PROJECT_DIR$/target/" />
     <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
       <usages-collector id="statistics.file.extensions.open">
         <counts>
           <entry key="iml" value="1" />
-          <entry key="java" value="18" />
+          <entry key="java" value="20" />
           <entry key="xml" value="1" />
         </counts>
       </usages-collector>
       <usages-collector id="statistics.file.types.open">
         <counts>
           <entry key="IDEA_MODULE" value="1" />
-          <entry key="JAVA" value="18" />
+          <entry key="JAVA" value="20" />
           <entry key="XML" value="1" />
         </counts>
       </usages-collector>
       <usages-collector id="statistics.file.extensions.edit">
         <counts>
-          <entry key="java" value="5728" />
+          <entry key="java" value="6162" />
         </counts>
       </usages-collector>
       <usages-collector id="statistics.file.types.edit">
         <counts>
-          <entry key="JAVA" value="5728" />
+          <entry key="JAVA" value="6162" />
         </counts>
       </usages-collector>
     </session>
   </component>
   <component name="FileEditorManager">
-    <leaf>
+    <leaf SIDE_TABS_SIZE_LIMIT_KEY="300">
       <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/StudentsTest.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="105">
-              <caret line="7" column="57" selection-start-line="7" selection-start-column="57" selection-end-line="7" selection-end-column="57" />
-              <folding>
-                <element signature="imports" expanded="true" />
-              </folding>
+            <state relative-caret-position="90">
+              <caret line="9" column="8" selection-start-line="9" selection-start-column="8" selection-end-line="9" selection-end-column="8" />
             </state>
           </provider>
         </entry>
       </file>
       <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructor.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">
-              <caret line="4" column="42" selection-start-line="4" selection-start-column="42" selection-end-line="4" selection-end-column="42" />
-              <folding>
-                <element signature="e#125#126#0" expanded="true" />
-                <element signature="e#150#151#0" expanded="true" />
-              </folding>
+            <state relative-caret-position="30">
+              <caret line="2" column="17" selection-start-line="2" selection-start-column="17" selection-end-line="2" selection-end-column="17" />
             </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="135">
-              <caret line="9" column="36" lean-forward="true" selection-start-line="9" selection-start-column="36" selection-end-line="9" selection-end-column="36" />
-              <folding>
-                <element signature="e#197#198#0" expanded="true" />
-                <element signature="e#227#228#0" expanded="true" />
-              </folding>
+              <caret line="9" column="9" selection-start-line="9" selection-start-column="9" selection-end-line="9" selection-end-column="9" />
             </state>
           </provider>
         </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/StudentsTest.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="195">
-              <caret line="13" column="44" selection-start-line="13" selection-start-column="44" selection-end-line="13" selection-end-column="44" />
+            <state relative-caret-position="90">
+              <caret line="7" column="57" selection-start-line="7" selection-start-column="57" selection-end-line="7" selection-end-column="57" />
+              <folding>
+                <element signature="imports" expanded="true" />
+              </folding>
             </state>
           </provider>
         </entry>
       </file>
       <file pinned="false" current-in-tab="false">
-        <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="165">
-              <caret line="12" column="24" selection-start-line="12" selection-start-column="24" selection-end-line="12" selection-end-column="24" />
+            <state relative-caret-position="240">
+              <caret line="17" column="11" selection-start-line="17" selection-start-column="11" selection-end-line="17" selection-end-column="11" />
             </state>
           </provider>
         </entry>
       </file>
-      <file pinned="false" current-in-tab="true">
+      <file pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/ZipCodeWilmingtonTest.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="240">
-              <caret line="16" column="48" lean-forward="true" selection-start-line="16" selection-start-column="48" selection-end-line="16" selection-end-column="48" />
+            <state relative-caret-position="150">
+              <caret line="10" selection-start-line="10" selection-end-line="10" />
               <folding>
                 <element signature="imports" expanded="true" />
               </folding>
         </entry>
       </file>
       <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestStudent.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="315">
-              <caret line="25" column="15" selection-start-line="25" selection-end-line="26" />
-              <folding>
-                <marker date="1541270715088" expanded="true" signature="135:199" ph="..." />
-              </folding>
+            <state relative-caret-position="45">
+              <caret line="3" column="13" selection-start-line="3" selection-start-column="13" selection-end-line="3" selection-end-column="13" />
             </state>
           </provider>
         </entry>
       </file>
       <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/People.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="570">
-              <caret line="38" column="41" selection-start-line="38" selection-start-column="41" selection-end-line="38" selection-end-column="41" />
-              <folding>
-                <element signature="e#164#172#0" expanded="true" />
-                <element signature="e#203#204#0" expanded="true" />
-                <element signature="e#228#229#0" expanded="true" />
-                <element signature="e#279#280#0" expanded="true" />
-                <element signature="e#304#305#0" expanded="true" />
-                <element signature="e#331#332#0" expanded="true" />
-                <element signature="e#356#357#0" expanded="true" />
-                <element signature="e#433#434#0" expanded="true" />
-                <element signature="e#458#459#0" expanded="true" />
-                <element signature="e#786#787#0" expanded="true" />
-                <element signature="e#829#830#0" expanded="true" />
-                <element signature="e#882#883#0" expanded="true" />
-                <element signature="e#916#917#0" expanded="true" />
-              </folding>
+            <state relative-caret-position="30">
+              <caret line="2" column="35" selection-start-line="2" selection-start-column="35" selection-end-line="2" selection-end-column="35" />
             </state>
           </provider>
         </entry>
       </file>
-      <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Student.java">
+      <file pinned="false" current-in-tab="true">
+        <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="180">
-              <caret line="12" selection-start-line="12" selection-end-line="12" />
+            <state relative-caret-position="195">
+              <caret line="13" column="20" selection-start-line="13" selection-start-column="20" selection-end-line="13" selection-end-column="20" />
               <folding>
-                <element signature="e#147#148#0" expanded="true" />
-                <element signature="e#172#173#0" expanded="true" />
-                <element signature="e#216#217#0" expanded="true" />
-                <element signature="e#300#301#0" expanded="true" />
-                <element signature="e#337#338#0" expanded="true" />
+                <element signature="e#225#226#0" expanded="true" />
+                <element signature="e#253#254#0" expanded="true" />
               </folding>
             </state>
           </provider>
         </entry>
       </file>
       <file pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Person.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="210">
-              <caret line="14" column="5" selection-start-line="14" selection-start-column="5" selection-end-line="14" selection-end-column="5" />
-              <folding>
-                <element signature="e#191#192#0" expanded="true" />
-                <element signature="e#219#220#0" expanded="true" />
-                <element signature="e#104#105#0" expanded="true" />
-                <element signature="e#129#130#0" expanded="true" />
-                <element signature="e#182#183#0" expanded="true" />
-                <element signature="e#209#210#0" expanded="true" />
-                <element signature="e#249#250#0" expanded="true" />
-                <element signature="e#281#282#0" expanded="true" />
-              </folding>
+            <state relative-caret-position="420">
+              <caret line="35" column="5" selection-start-line="35" selection-start-column="5" selection-end-line="35" selection-end-column="5" />
             </state>
           </provider>
         </entry>
         <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/Students.java" />
+        <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/ZipCodeWilmington.java" />
         <option value="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/ZipCodeWilmingtonTest.java" />
       </list>
     </option>
       <foldersAlwaysOnTop value="true" />
     </navigator>
     <panes>
+      <pane id="Scope" />
       <pane id="ProjectPane">
         <subPane>
           <expand>
           <select />
         </subPane>
       </pane>
-      <pane id="Scope" />
       <pane id="PackagesPane" />
     </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="1541277209799" />
+    <property name="com.android.tools.idea.instantapp.provision.ProvisionBeforeRunTaskProvider.myTimeStamp" value="1541426832861" />
     <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="Modules" />
       </list>
     </option>
   </component>
-  <component name="RunManager" selected="JUnit.InstructorsTest.testSingletonInstance">
+  <component name="RunManager" selected="JUnit.ZipCodeWilmingtonTest.testHostLecture">
     <configuration name="InstructorsTest.testInitializationSetupInstructors" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
       <module name="interfaces-1" />
       <extension name="coverage">
         <option name="Make" enabled="true" />
       </method>
     </configuration>
-    <configuration name="PeopleTest.testRemoveAll" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+    <configuration name="StudentsTest.testInitializationSetupStudents" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
       <module name="interfaces-1" />
       <extension name="coverage">
         <pattern>
         </pattern>
       </extension>
       <option name="PACKAGE_NAME" value="io.zipcoder.interfaces" />
-      <option name="MAIN_CLASS_NAME" value="io.zipcoder.interfaces.PeopleTest" />
-      <option name="METHOD_NAME" value="testRemoveAll" />
+      <option name="MAIN_CLASS_NAME" value="io.zipcoder.interfaces.StudentsTest" />
+      <option name="METHOD_NAME" value="testInitializationSetupStudents" />
       <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="StudentsTest.testSingletonInstance" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
       <module name="interfaces-1" />
       <extension name="coverage">
         <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="METHOD_NAME" value="testSingletonInstance" />
       <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="ZipCodeWilmingtonTest.testHostLecture" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
       <module name="interfaces-1" />
       <extension name="coverage">
         <pattern>
         </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.ZipCodeWilmingtonTest" />
+      <option name="METHOD_NAME" value="testHostLecture" />
       <option name="TEST_OBJECT" value="method" />
       <method v="2">
         <option name="Make" enabled="true" />
       </method>
     </configuration>
     <list>
-      <item itemvalue="JUnit.PeopleTest.testRemoveAll" />
       <item itemvalue="JUnit.StudentsTest.testSingletonInstance" />
       <item itemvalue="JUnit.StudentsTest.testInitializationSetupStudents" />
       <item itemvalue="JUnit.InstructorsTest.testSingletonInstance" />
       <item itemvalue="JUnit.InstructorsTest.testInitializationSetupInstructors" />
+      <item itemvalue="JUnit.ZipCodeWilmingtonTest.testHostLecture" />
     </list>
     <recent_temporary>
       <list>
+        <item itemvalue="JUnit.ZipCodeWilmingtonTest.testHostLecture" />
         <item itemvalue="JUnit.InstructorsTest.testSingletonInstance" />
         <item itemvalue="JUnit.InstructorsTest.testInitializationSetupInstructors" />
         <item itemvalue="JUnit.StudentsTest.testInitializationSetupStudents" />
         <item itemvalue="JUnit.StudentsTest.testSingletonInstance" />
-        <item itemvalue="JUnit.PeopleTest.testRemoveAll" />
       </list>
     </recent_temporary>
   </component>
     </history-entry>
   </component>
   <component name="TimeTrackingManager">
-    <option name="totallyTimeSpent" value="14351000" />
+    <option name="totallyTimeSpent" value="15183000" />
   </component>
   <component name="ToolWindowManager">
-    <frame x="0" y="0" width="1440" height="900" extended-state="6" />
+    <frame x="0" y="0" width="1440" height="900" extended-state="0" />
     <editor active="true" />
     <layout>
       <window_info id="Image Layers" order="0" />
       <window_info id="UI Designer" order="2" />
       <window_info id="Learn" order="3" />
       <window_info id="Capture Tool" order="4" />
-      <window_info active="true" content_ui="combo" id="Project" order="5" visible="true" weight="0.24964234" />
+      <window_info active="true" content_ui="combo" id="Project" order="5" visible="true" weight="0.2532189" />
       <window_info id="Structure" order="6" side_tool="true" weight="0.25" />
       <window_info id="Favorites" order="7" side_tool="true" />
       <window_info anchor="bottom" id="Terminal" order="0" />
       <window_info anchor="right" id="Ant Build" order="7" weight="0.25" />
       <window_info anchor="right" content_ui="combo" id="Hierarchy" order="8" weight="0.25" />
     </layout>
+    <layout-to-restore>
+      <window_info id="Image Layers" order="0" />
+      <window_info id="Designer" order="1" />
+      <window_info id="UI Designer" order="2" />
+      <window_info id="Learn" order="3" />
+      <window_info id="Capture Tool" order="4" />
+      <window_info content_ui="combo" id="Project" order="5" visible="true" weight="0.24964234" />
+      <window_info id="Structure" order="6" side_tool="true" weight="0.25" />
+      <window_info id="Favorites" order="7" side_tool="true" />
+      <window_info anchor="bottom" id="Terminal" order="0" />
+      <window_info anchor="bottom" id="Event Log" order="1" side_tool="true" />
+      <window_info anchor="bottom" id="Database Changes" order="2" show_stripe_button="false" />
+      <window_info anchor="bottom" id="Version Control" order="3" show_stripe_button="false" />
+      <window_info anchor="bottom" id="Message" order="4" />
+      <window_info anchor="bottom" id="Find" order="5" />
+      <window_info anchor="bottom" id="Run" order="6" weight="0.32891566" />
+      <window_info anchor="bottom" id="Debug" order="7" weight="0.4" />
+      <window_info active="true" anchor="bottom" id="Messages" order="8" visible="true" weight="0.32891566" />
+      <window_info anchor="bottom" id="Cvs" order="9" weight="0.25" />
+      <window_info anchor="bottom" id="Inspection" order="10" weight="0.4" />
+      <window_info anchor="bottom" id="TODO" order="11" />
+      <window_info anchor="right" id="Capture Analysis" order="0" />
+      <window_info anchor="right" id="Theme Preview" order="1" />
+      <window_info anchor="right" id="Database" order="2" />
+      <window_info anchor="right" id="Palette&#9;" order="3" />
+      <window_info anchor="right" id="Maven Projects" order="4" />
+      <window_info anchor="right" id="Palette" order="5" />
+      <window_info anchor="right" id="Commander" internal_type="SLIDING" order="6" type="SLIDING" weight="0.4" />
+      <window_info anchor="right" id="Ant Build" order="7" weight="0.25" />
+      <window_info anchor="right" content_ui="combo" id="Hierarchy" order="8" weight="0.25" />
+    </layout-to-restore>
   </component>
   <component name="TypeScriptGeneratedFilesManager">
     <option name="version" value="1" />
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/Teacher.java">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="30">
-          <caret line="2" column="23" selection-start-line="2" selection-start-column="23" selection-end-line="2" selection-end-column="23" />
-        </state>
-      </provider>
-    </entry>
-    <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="135">
-          <caret line="9" lean-forward="true" selection-start-line="9" selection-end-line="9" />
-        </state>
-      </provider>
-    </entry>
+    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/Teacher.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="255">
     </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="360">
-          <caret line="113" column="49" selection-start-line="113" selection-start-column="49" selection-end-line="113" selection-end-column="49" />
+        <state relative-caret-position="165">
+          <caret line="13" selection-start-line="13" selection-end-line="13" />
           <folding>
             <element signature="imports" expanded="true" />
-            <element signature="e#184#185#0" expanded="true" />
-            <element signature="e#219#220#0" expanded="true" />
-          </folding>
-        </state>
-      </provider>
-    </entry>
-    <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="210">
-          <caret line="14" column="5" selection-start-line="14" selection-start-column="5" selection-end-line="14" selection-end-column="5" />
-          <folding>
-            <element signature="e#191#192#0" expanded="true" />
-            <element signature="e#219#220#0" expanded="true" />
-            <element signature="e#104#105#0" expanded="true" />
-            <element signature="e#129#130#0" expanded="true" />
-            <element signature="e#182#183#0" expanded="true" />
-            <element signature="e#209#210#0" expanded="true" />
-            <element signature="e#249#250#0" expanded="true" />
-            <element signature="e#281#282#0" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/StudentsTest.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="105">
+        <state relative-caret-position="90">
           <caret line="7" column="57" selection-start-line="7" selection-start-column="57" selection-end-line="7" selection-end-column="57" />
           <folding>
             <element signature="imports" expanded="true" />
         </state>
       </provider>
     </entry>
-    <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="60">
-          <caret line="4" column="42" selection-start-line="4" selection-start-column="42" selection-end-line="4" selection-end-column="42" />
-          <folding>
-            <element signature="e#125#126#0" expanded="true" />
-            <element signature="e#150#151#0" expanded="true" />
-          </folding>
-        </state>
-      </provider>
-    </entry>
     <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="195">
-          <caret line="13" column="44" selection-start-line="13" selection-start-column="44" selection-end-line="13" selection-end-column="44" />
+        <state relative-caret-position="240">
+          <caret line="17" column="11" selection-start-line="17" selection-start-column="11" selection-end-line="17" selection-end-column="11" />
         </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="135">
-          <caret line="9" column="36" lean-forward="true" selection-start-line="9" selection-start-column="36" selection-end-line="9" selection-end-column="36" />
-          <folding>
-            <element signature="e#197#198#0" expanded="true" />
-            <element signature="e#227#228#0" expanded="true" />
-          </folding>
+          <caret line="9" column="9" selection-start-line="9" selection-start-column="9" selection-end-line="9" selection-end-column="9" />
+        </state>
+      </provider>
+    </entry>
+    <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="420">
+          <caret line="35" column="5" selection-start-line="35" selection-start-column="5" selection-end-line="35" selection-end-column="5" />
+        </state>
+      </provider>
+    </entry>
+    <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="315">
+          <caret line="25" column="15" selection-start-line="25" selection-end-line="26" />
+        </state>
+      </provider>
+    </entry>
+    <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="30">
+          <caret line="2" column="17" selection-start-line="2" selection-start-column="17" selection-end-line="2" selection-end-column="17" />
         </state>
       </provider>
     </entry>
     <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="180">
-          <caret line="12" selection-start-line="12" selection-end-line="12" />
-          <folding>
-            <element signature="e#147#148#0" expanded="true" />
-            <element signature="e#172#173#0" expanded="true" />
-            <element signature="e#216#217#0" expanded="true" />
-            <element signature="e#300#301#0" expanded="true" />
-            <element signature="e#337#338#0" expanded="true" />
-          </folding>
+        <state relative-caret-position="30">
+          <caret line="2" column="35" selection-start-line="2" selection-start-column="35" selection-end-line="2" selection-end-column="35" />
         </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="570">
-          <caret line="38" column="41" selection-start-line="38" selection-start-column="41" selection-end-line="38" selection-end-column="41" />
-          <folding>
-            <element signature="e#164#172#0" expanded="true" />
-            <element signature="e#203#204#0" expanded="true" />
-            <element signature="e#228#229#0" expanded="true" />
-            <element signature="e#279#280#0" expanded="true" />
-            <element signature="e#304#305#0" expanded="true" />
-            <element signature="e#331#332#0" expanded="true" />
-            <element signature="e#356#357#0" expanded="true" />
-            <element signature="e#433#434#0" expanded="true" />
-            <element signature="e#458#459#0" expanded="true" />
-            <element signature="e#786#787#0" expanded="true" />
-            <element signature="e#829#830#0" expanded="true" />
-            <element signature="e#882#883#0" expanded="true" />
-            <element signature="e#916#917#0" expanded="true" />
-          </folding>
+        <state relative-caret-position="90">
+          <caret line="9" column="8" selection-start-line="9" selection-start-column="8" selection-end-line="9" selection-end-column="8" />
         </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/ZipCodeWilmington.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="315">
-          <caret line="25" column="15" selection-start-line="25" selection-end-line="26" />
-          <folding>
-            <marker date="1541270715088" expanded="true" signature="135:199" ph="..." />
-          </folding>
+        <state relative-caret-position="45">
+          <caret line="3" column="13" selection-start-line="3" selection-start-column="13" selection-end-line="3" selection-end-column="13" />
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/ZipCodeWilmingtonTest.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="240">
-          <caret line="16" column="48" lean-forward="true" selection-start-line="16" selection-start-column="48" selection-end-line="16" selection-end-column="48" />
+        <state relative-caret-position="150">
+          <caret line="10" selection-start-line="10" selection-end-line="10" />
           <folding>
             <element signature="imports" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
+    <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="195">
+          <caret line="13" column="20" selection-start-line="13" selection-start-column="20" selection-end-line="13" selection-end-column="20" />
+          <folding>
+            <element signature="e#225#226#0" expanded="true" />
+            <element signature="e#253#254#0" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
   </component>
   <component name="masterDetails">
     <states>

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

+package io.zipcoder.interfaces;
+
+public enum ZipCodeWilmington {
+    INSTANCE;
+
+    Students students = Students.getInstance();
+    Instructors instructors = Instructors.getInstance();
+
+    public void hostLecture(Teacher teacher, double numberOfHours) {
+        Student[] studentsArray = (Student[]) students.studentList.getArray();
+        teacher.lecture(studentsArray, numberOfHours);
+    }
+
+    public void hostLecture(long id, double numberOfHours) {
+        Student[] studentsArray = (Student[]) students.studentList.getArray();
+        Teacher teacher = (Teacher) instructors.instructorList.findByID(id);
+        teacher.lecture(studentsArray, numberOfHours);
+    }
+
+}

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

 
     @Test
     public void testHostLecture() {
-        Students students = Students.getInstance();
-        Student[] studentListArray = (Student[]) students.studentList.getArray();
+        ZipCodeWilmington zcw = ZipCodeWilmington.INSTANCE;
+        Student[] studentsArray = (Student[]) zcw.students.studentList.getArray();
+        Instructor[] instructorsArray = (Instructor[]) zcw.instructors.instructorList.getArray();
 
-        double before = studentListArray[0].getTotalStudyTime();
-        ZipCodeWilmington.hostLecture(1, students.studentList);
-        double after = studentListArray[0].getTotalStudyTime();
+        double before = studentsArray[0].getTotalStudyTime();
+        zcw.hostLecture(instructorsArray[0], 1);
+        double after = studentsArray[0].getTotalStudyTime();
 
         Assert.assertTrue(after-before == 1/39);
     }