Completed till part5

.idea/.name

@@ -0,0 +1 @@
+interfaces-1

.idea/compiler.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <annotationProcessing>
+      <profile name="Maven default annotation processors profile" enabled="true">
+        <sourceOutputDir name="target/generated-sources/annotations" />
+        <sourceTestOutputDir name="target/generated-test-sources/test-annotations" />
+        <outputRelativeToContentRoot value="true" />
+        <module name="interfaces-1" />
+      </profile>
+    </annotationProcessing>
+    <bytecodeTargetLevel>
+      <module name="interfaces-1" target="1.5" />
+    </bytecodeTargetLevel>
+  </component>
+</project>

.idea/encodings.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding">
+    <file url="file://$PROJECT_DIR$" charset="UTF-8" />
+  </component>
+</project>

.idea/libraries/Maven__junit_junit_4_12.xml

@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Maven: junit:junit:4.12">
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/junit/junit/4.12/junit-4.12.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://$MAVEN_REPOSITORY$/junit/junit/4.12/junit-4.12-javadoc.jar!/" />
+    </JAVADOC>
+    <SOURCES>
+      <root url="jar://$MAVEN_REPOSITORY$/junit/junit/4.12/junit-4.12-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>

.idea/libraries/Maven__org_hamcrest_hamcrest_core_1_3.xml

@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Maven: org.hamcrest:hamcrest-core:1.3">
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://$MAVEN_REPOSITORY$/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3-javadoc.jar!/" />
+    </JAVADOC>
+    <SOURCES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>

.idea/misc.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="MavenProjectsManager">
+    <option name="originalFiles">
+      <list>
+        <option value="$PROJECT_DIR$/pom.xml" />
+      </list>
+    </option>
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/classes" />
+  </component>
+</project>

.idea/modules.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/interfaces-1.iml" filepath="$PROJECT_DIR$/interfaces-1.iml" />
+    </modules>
+  </component>
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

.idea/workspace.xml

@@ -0,0 +1,727 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ChangeListManager">
+    <list default="true" id="ac1bf5b2-4c7f-4a95-bc39-d60020b9fb88" name="Default Changelist" comment="">
+      <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/modules.xml" 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/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/Teacher.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestInstructor.java" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestStudent.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" />
+    </list>
+    <ignored path="$PROJECT_DIR$/target/" />
+    <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
+    <option name="SHOW_DIALOG" value="false" />
+    <option name="HIGHLIGHT_CONFLICTS" value="true" />
+    <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
+    <option name="LAST_RESOLUTION" value="IGNORE" />
+  </component>
+  <component name="FUSProjectUsageTrigger">
+    <session id="929037324">
+      <usages-collector id="statistics.lifecycle.project">
+        <counts>
+          <entry key="project.closed" value="1" />
+          <entry key="project.open.time.1" value="1" />
+          <entry key="project.opened" value="1" />
+        </counts>
+      </usages-collector>
+      <usages-collector id="statistics.file.extensions.open">
+        <counts>
+          <entry key="java" value="9" />
+          <entry key="md" value="1" />
+        </counts>
+      </usages-collector>
+      <usages-collector id="statistics.file.types.open">
+        <counts>
+          <entry key="JAVA" value="9" />
+          <entry key="Markdown" value="1" />
+        </counts>
+      </usages-collector>
+      <usages-collector id="statistics.file.extensions.edit">
+        <counts>
+          <entry key="java" value="4125" />
+        </counts>
+      </usages-collector>
+      <usages-collector id="statistics.file.types.edit">
+        <counts>
+          <entry key="JAVA" value="4125" />
+        </counts>
+      </usages-collector>
+    </session>
+  </component>
+  <component name="FileEditorManager">
+    <leaf>
+      <file pinned="false" current-in-tab="false">
+        <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="405">
+              <caret line="27" selection-start-line="27" selection-end-line="27" />
+              <folding>
+                <element signature="e#235#236#0" expanded="true" />
+                <element signature="e#263#264#0" expanded="true" />
+                <element signature="e#231#232#0" expanded="true" />
+                <element signature="e#256#257#0" expanded="true" />
+                <element signature="e#292#293#0" expanded="true" />
+                <element signature="e#316#317#0" expanded="true" />
+                <element signature="e#351#352#0" expanded="true" />
+                <element signature="e#383#384#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/Student.java">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="315">
+              <caret line="21" column="1" lean-forward="true" selection-start-line="21" selection-start-column="1" selection-end-line="21" selection-end-column="1" />
+              <folding>
+                <element signature="e#260#261#0" expanded="true" />
+                <element signature="e#289#290#0" expanded="true" />
+                <element signature="e#333#334#0" expanded="true" />
+                <element signature="e#361#362#0" expanded="true" />
+                <element signature="e#404#405#0" expanded="true" />
+                <element signature="e#451#452#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/Teacher.java">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="90">
+              <caret line="6" column="62" selection-start-line="6" selection-start-column="62" selection-end-line="6" selection-end-column="62" />
+            </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="345">
+              <caret line="23" column="5" lean-forward="true" selection-start-line="23" selection-start-column="5" selection-end-line="23" selection-end-column="5" />
+              <folding>
+                <element signature="e#138#139#0" expanded="true" />
+                <element signature="e#169#170#0" expanded="true" />
+                <element signature="e#203#204#0" expanded="true" />
+                <element signature="e#228#229#0" expanded="true" />
+              </folding>
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file pinned="false" current-in-tab="true">
+        <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="28">
+              <caret line="6" column="60" lean-forward="true" selection-start-line="6" selection-start-column="60" selection-end-line="6" selection-end-column="60" />
+              <folding>
+                <element signature="e#134#142#0" expanded="true" />
+                <element signature="e#486#487#0" expanded="true" />
+                <element signature="e#535#536#0" 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/TestInstructor.java">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="403">
+              <caret line="47" column="96" selection-start-line="47" selection-start-column="96" selection-end-line="47" selection-end-column="96" />
+              <folding>
+                <element signature="imports" expanded="true" />
+                <element signature="e#164#165#0" expanded="true" />
+                <element signature="e#228#229#0" expanded="true" />
+                <element signature="e#333#334#0" expanded="true" />
+                <element signature="e#355#356#0" expanded="true" />
+              </folding>
+            </state>
+          </provider>
+        </entry>
+      </file>
+    </leaf>
+  </component>
+  <component name="FileTemplateManagerImpl">
+    <option name="RECENT_TEMPLATES">
+      <list>
+        <option value="Interface" />
+        <option value="Class" />
+      </list>
+    </option>
+  </component>
+  <component name="Git.Settings">
+    <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$" />
+  </component>
+  <component name="IdeDocumentHistory">
+    <option name="CHANGED_PATHS">
+      <list>
+        <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Learner.java" />
+        <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Teacher.java" />
+        <option value="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestPerson.java" />
+        <option value="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestStudent.java" />
+        <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Person.java" />
+        <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Student.java" />
+        <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Instructor.java" />
+        <option value="$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestInstructor.java" />
+        <option value="$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/People.java" />
+      </list>
+    </option>
+  </component>
+  <component name="JsBuildToolGruntFileManager" detection-done="true" sorting="DEFINITION_ORDER" />
+  <component name="JsBuildToolPackageJson" detection-done="true" sorting="DEFINITION_ORDER" />
+  <component name="JsGulpfileManager">
+    <detection-done>true</detection-done>
+    <sorting>DEFINITION_ORDER</sorting>
+  </component>
+  <component name="ProjectFrameBounds">
+    <option name="y" value="86" />
+    <option name="width" value="1280" />
+    <option name="height" value="722" />
+  </component>
+  <component name="ProjectLevelVcsManager" settingsEditedManually="true">
+    <ConfirmationsSetting value="2" id="Add" />
+  </component>
+  <component name="ProjectView">
+    <navigator proportions="" version="1">
+      <foldersAlwaysOnTop value="true" />
+    </navigator>
+    <panes>
+      <pane id="PackagesPane" />
+      <pane id="ProjectPane">
+        <subPane>
+          <expand>
+            <path>
+              <item name="interfaces-1" type="b2602c69:ProjectViewProjectNode" />
+              <item name="CR-MacroLabs-OOP-InstructorStudentClassroom" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="interfaces-1" type="b2602c69:ProjectViewProjectNode" />
+              <item name="CR-MacroLabs-OOP-InstructorStudentClassroom" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="interfaces-1" type="b2602c69:ProjectViewProjectNode" />
+              <item name="CR-MacroLabs-OOP-InstructorStudentClassroom" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="main" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="interfaces-1" type="b2602c69:ProjectViewProjectNode" />
+              <item name="CR-MacroLabs-OOP-InstructorStudentClassroom" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="main" type="462c0819:PsiDirectoryNode" />
+              <item name="java" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="interfaces-1" type="b2602c69:ProjectViewProjectNode" />
+              <item name="CR-MacroLabs-OOP-InstructorStudentClassroom" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="main" type="462c0819:PsiDirectoryNode" />
+              <item name="java" type="462c0819:PsiDirectoryNode" />
+              <item name="interfaces" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="interfaces-1" type="b2602c69:ProjectViewProjectNode" />
+              <item name="CR-MacroLabs-OOP-InstructorStudentClassroom" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="test" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="interfaces-1" type="b2602c69:ProjectViewProjectNode" />
+              <item name="CR-MacroLabs-OOP-InstructorStudentClassroom" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="test" type="462c0819:PsiDirectoryNode" />
+              <item name="java" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="interfaces-1" type="b2602c69:ProjectViewProjectNode" />
+              <item name="CR-MacroLabs-OOP-InstructorStudentClassroom" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="test" type="462c0819:PsiDirectoryNode" />
+              <item name="java" type="462c0819:PsiDirectoryNode" />
+              <item name="interfaces" type="462c0819:PsiDirectoryNode" />
+            </path>
+          </expand>
+          <select />
+        </subPane>
+      </pane>
+      <pane id="Scope" />
+    </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="1542398624266" />
+    <property name="last_opened_file_path" value="$PROJECT_DIR$/pom.xml" />
+    <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.side.proportion" value="0.0" />
+  </component>
+  <component name="RunDashboard">
+    <option name="ruleStates">
+      <list>
+        <RuleState>
+          <option name="name" value="ConfigurationTypeDashboardGroupingRule" />
+        </RuleState>
+        <RuleState>
+          <option name="name" value="StatusDashboardGroupingRule" />
+        </RuleState>
+      </list>
+    </option>
+  </component>
+  <component name="RunManager" selected="JUnit.TestInstructor.testLecture">
+    <configuration name="TestInstructor.testImplementation" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+      <module name="interfaces-1" />
+      <extension name="coverage">
+        <pattern>
+          <option name="PATTERN" value="io.zipcoder.interfaces.*" />
+          <option name="ENABLED" value="true" />
+        </pattern>
+      </extension>
+      <option name="PACKAGE_NAME" value="io.zipcoder.interfaces" />
+      <option name="MAIN_CLASS_NAME" value="io.zipcoder.interfaces.TestInstructor" />
+      <option name="METHOD_NAME" value="testImplementation" />
+      <option name="TEST_OBJECT" value="method" />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
+    <configuration name="TestInstructor.testInheritance" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+      <module name="interfaces-1" />
+      <extension name="coverage">
+        <pattern>
+          <option name="PATTERN" value="io.zipcoder.interfaces.*" />
+          <option name="ENABLED" value="true" />
+        </pattern>
+      </extension>
+      <option name="PACKAGE_NAME" value="io.zipcoder.interfaces" />
+      <option name="MAIN_CLASS_NAME" value="io.zipcoder.interfaces.TestInstructor" />
+      <option name="METHOD_NAME" value="testInheritance" />
+      <option name="TEST_OBJECT" value="method" />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
+    <configuration name="TestInstructor.testLecture" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+      <module name="interfaces-1" />
+      <extension name="coverage">
+        <pattern>
+          <option name="PATTERN" value="io.zipcoder.interfaces.*" />
+          <option name="ENABLED" value="true" />
+        </pattern>
+      </extension>
+      <option name="PACKAGE_NAME" value="io.zipcoder.interfaces" />
+      <option name="MAIN_CLASS_NAME" value="io.zipcoder.interfaces.TestInstructor" />
+      <option name="METHOD_NAME" value="testLecture" />
+      <option name="TEST_OBJECT" value="method" />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
+    <configuration name="TestInstructor.testTeach" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+      <module name="interfaces-1" />
+      <extension name="coverage">
+        <pattern>
+          <option name="PATTERN" value="io.zipcoder.interfaces.*" />
+          <option name="ENABLED" value="true" />
+        </pattern>
+      </extension>
+      <option name="PACKAGE_NAME" value="io.zipcoder.interfaces" />
+      <option name="MAIN_CLASS_NAME" value="io.zipcoder.interfaces.TestInstructor" />
+      <option name="METHOD_NAME" value="testTeach" />
+      <option name="TEST_OBJECT" value="method" />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
+    <configuration name="TestPerson" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
+      <module name="interfaces-1" />
+      <extension name="coverage">
+        <pattern>
+          <option name="PATTERN" value="io.zipcoder.interfaces.*" />
+          <option name="ENABLED" value="true" />
+        </pattern>
+      </extension>
+      <option name="PACKAGE_NAME" value="io.zipcoder.interfaces" />
+      <option name="MAIN_CLASS_NAME" value="io.zipcoder.interfaces.TestPerson" />
+      <method v="2">
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
+    <configuration default="true" type="tests" factoryName="Nosetests">
+      <option name="INTERPRETER_OPTIONS" value="" />
+      <option name="PARENT_ENVS" value="true" />
+      <option name="SDK_HOME" value="" />
+      <option name="WORKING_DIRECTORY" value="" />
+      <option name="IS_MODULE_SDK" value="false" />
+      <option name="ADD_CONTENT_ROOTS" value="true" />
+      <option name="ADD_SOURCE_ROOTS" value="true" />
+      <module name="" />
+      <EXTENSION ID="PythonCoverageRunConfigurationExtension" runner="coverage.py" />
+      <option name="_new_regexPattern" value="&quot;&quot;" />
+      <option name="_new_additionalArguments" value="&quot;&quot;" />
+      <option name="_new_target" value="&quot;&quot;" />
+      <option name="_new_targetType" value="&quot;PATH&quot;" />
+      <method v="2" />
+    </configuration>
+    <configuration default="true" type="tests" factoryName="Twisted Trial">
+      <option name="INTERPRETER_OPTIONS" value="" />
+      <option name="PARENT_ENVS" value="true" />
+      <option name="SDK_HOME" value="" />
+      <option name="WORKING_DIRECTORY" value="" />
+      <option name="IS_MODULE_SDK" value="false" />
+      <option name="ADD_CONTENT_ROOTS" value="true" />
+      <option name="ADD_SOURCE_ROOTS" value="true" />
+      <module name="" />
+      <EXTENSION ID="PythonCoverageRunConfigurationExtension" runner="coverage.py" />
+      <option name="_new_additionalArguments" value="&quot;&quot;" />
+      <option name="_new_target" value="&quot;&quot;" />
+      <option name="_new_targetType" value="&quot;PATH&quot;" />
+      <method v="2" />
+    </configuration>
+    <configuration default="true" type="tests" factoryName="Unittests">
+      <option name="INTERPRETER_OPTIONS" value="" />
+      <option name="PARENT_ENVS" value="true" />
+      <option name="SDK_HOME" value="" />
+      <option name="WORKING_DIRECTORY" value="" />
+      <option name="IS_MODULE_SDK" value="false" />
+      <option name="ADD_CONTENT_ROOTS" value="true" />
+      <option name="ADD_SOURCE_ROOTS" value="true" />
+      <module name="" />
+      <EXTENSION ID="PythonCoverageRunConfigurationExtension" runner="coverage.py" />
+      <option name="_new_additionalArguments" value="&quot;&quot;" />
+      <option name="_new_target" value="&quot;&quot;" />
+      <option name="_new_targetType" value="&quot;PATH&quot;" />
+      <method v="2" />
+    </configuration>
+    <configuration default="true" type="tests" factoryName="py.test">
+      <option name="INTERPRETER_OPTIONS" value="" />
+      <option name="PARENT_ENVS" value="true" />
+      <option name="SDK_HOME" value="" />
+      <option name="WORKING_DIRECTORY" value="" />
+      <option name="IS_MODULE_SDK" value="false" />
+      <option name="ADD_CONTENT_ROOTS" value="true" />
+      <option name="ADD_SOURCE_ROOTS" value="true" />
+      <module name="" />
+      <EXTENSION ID="PythonCoverageRunConfigurationExtension" runner="coverage.py" />
+      <option name="_new_keywords" value="&quot;&quot;" />
+      <option name="_new_additionalArguments" value="&quot;&quot;" />
+      <option name="_new_target" value="&quot;&quot;" />
+      <option name="_new_targetType" value="&quot;PATH&quot;" />
+      <method v="2" />
+    </configuration>
+    <list>
+      <item itemvalue="JUnit.TestPerson" />
+      <item itemvalue="JUnit.TestInstructor.testImplementation" />
+      <item itemvalue="JUnit.TestInstructor.testTeach" />
+      <item itemvalue="JUnit.TestInstructor.testInheritance" />
+      <item itemvalue="JUnit.TestInstructor.testLecture" />
+    </list>
+    <recent_temporary>
+      <list>
+        <item itemvalue="JUnit.TestInstructor.testLecture" />
+        <item itemvalue="JUnit.TestInstructor.testInheritance" />
+        <item itemvalue="JUnit.TestInstructor.testImplementation" />
+        <item itemvalue="JUnit.TestInstructor.testTeach" />
+        <item itemvalue="JUnit.TestPerson" />
+      </list>
+    </recent_temporary>
+  </component>
+  <component name="SvnConfiguration">
+    <configuration />
+  </component>
+  <component name="TaskManager">
+    <task active="true" id="Default" summary="Default task">
+      <changelist id="ac1bf5b2-4c7f-4a95-bc39-d60020b9fb88" name="Default Changelist" comment="" />
+      <created>1542340589455</created>
+      <option name="number" value="Default" />
+      <option name="presentableId" value="Default" />
+      <updated>1542340589455</updated>
+      <workItem from="1542340590829" duration="14354000" />
+    </task>
+    <servers />
+  </component>
+  <component name="TestHistory">
+    <history-entry file="TestStudent_testLearn - 2018.11.16 at 09h 26m 16s.xml">
+      <configuration name="TestStudent.testLearn" configurationId="JUnit" />
+    </history-entry>
+    <history-entry file="TestStudent - 2018.11.16 at 09h 27m 35s.xml">
+      <configuration name="TestStudent" configurationId="JUnit" />
+    </history-entry>
+    <history-entry file="TestStudent - 2018.11.16 at 09h 27m 45s.xml">
+      <configuration name="TestStudent" configurationId="JUnit" />
+    </history-entry>
+    <history-entry file="TestPerson - 2018.11.16 at 09h 27m 52s.xml">
+      <configuration name="TestPerson" configurationId="JUnit" />
+    </history-entry>
+    <history-entry file="TestInstructor_testTeach - 2018.11.16 at 11h 46m 59s.xml">
+      <configuration name="TestInstructor.testTeach" configurationId="JUnit" />
+    </history-entry>
+    <history-entry file="TestInstructor_testImplementation - 2018.11.16 at 11h 47m 06s.xml">
+      <configuration name="TestInstructor.testImplementation" configurationId="JUnit" />
+    </history-entry>
+    <history-entry file="TestInstructor_testInheritance - 2018.11.16 at 11h 47m 09s.xml">
+      <configuration name="TestInstructor.testInheritance" configurationId="JUnit" />
+    </history-entry>
+    <history-entry file="TestInstructor_testLecture - 2018.11.16 at 11h 48m 34s.xml">
+      <configuration name="TestInstructor.testLecture" configurationId="JUnit" />
+    </history-entry>
+    <history-entry file="TestInstructor_testLecture - 2018.11.16 at 12h 13m 14s.xml">
+      <configuration name="TestInstructor.testLecture" configurationId="JUnit" />
+    </history-entry>
+    <history-entry file="TestInstructor_testLecture - 2018.11.16 at 12h 13m 29s.xml">
+      <configuration name="TestInstructor.testLecture" configurationId="JUnit" />
+    </history-entry>
+  </component>
+  <component name="TimeTrackingManager">
+    <option name="totallyTimeSpent" value="14354000" />
+  </component>
+  <component name="ToolWindowManager">
+    <frame x="0" y="86" width="1280" height="722" extended-state="0" />
+    <editor active="true" />
+    <layout>
+      <window_info id="Image Layers" />
+      <window_info id="Designer" />
+      <window_info id="UI Designer" />
+      <window_info id="Capture Tool" />
+      <window_info id="Favorites" side_tool="true" />
+      <window_info content_ui="combo" id="Project" order="0" weight="0.24959612" />
+      <window_info id="Structure" order="1" side_tool="true" weight="0.25" />
+      <window_info anchor="bottom" id="Messages" weight="0.32857144" />
+      <window_info anchor="bottom" id="Database Changes" show_stripe_button="false" />
+      <window_info anchor="bottom" id="Version Control" show_stripe_button="false" />
+      <window_info anchor="bottom" id="Terminal" />
+      <window_info anchor="bottom" id="Event Log" side_tool="true" />
+      <window_info anchor="bottom" id="Message" order="0" />
+      <window_info anchor="bottom" id="Find" order="1" />
+      <window_info anchor="bottom" id="Run" order="2" weight="0.32857144" />
+      <window_info anchor="bottom" id="Debug" order="3" weight="0.4" />
+      <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="right" id="Palette" />
+      <window_info anchor="right" id="Theme Preview" />
+      <window_info anchor="right" id="Capture Analysis" />
+      <window_info anchor="right" id="Palette&#9;" />
+      <window_info anchor="right" id="SciView" />
+      <window_info anchor="right" id="Database" />
+      <window_info anchor="right" id="Maven Projects" />
+      <window_info anchor="right" id="Commander" internal_type="SLIDING" order="0" type="SLIDING" weight="0.4" />
+      <window_info anchor="right" id="Ant Build" order="1" weight="0.25" />
+      <window_info anchor="right" content_ui="combo" id="Hierarchy" order="2" 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="Capture Tool" order="3" />
+      <window_info id="Favorites" order="4" side_tool="true" />
+      <window_info active="true" content_ui="combo" id="Project" order="5" visible="true" weight="0.24959612" />
+      <window_info id="Structure" order="6" side_tool="true" weight="0.25" />
+      <window_info anchor="bottom" id="Version Control" order="0" show_stripe_button="false" />
+      <window_info anchor="bottom" id="Terminal" order="1" />
+      <window_info anchor="bottom" id="Event Log" order="2" side_tool="true" />
+      <window_info anchor="bottom" id="Database Changes" order="3" show_stripe_button="false" />
+      <window_info anchor="bottom" id="Messages" order="4" weight="0.32857144" />
+      <window_info anchor="bottom" id="Message" order="5" />
+      <window_info anchor="bottom" id="Find" order="6" />
+      <window_info anchor="bottom" id="Run" order="7" visible="true" weight="0.32857144" />
+      <window_info anchor="bottom" id="Debug" order="8" weight="0.4" />
+      <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="Palette" order="0" />
+      <window_info anchor="right" id="Capture Analysis" order="1" />
+      <window_info anchor="right" id="Database" order="2" />
+      <window_info anchor="right" id="Theme Preview" order="3" />
+      <window_info anchor="right" id="Palette&#9;" order="4" />
+      <window_info anchor="right" id="SciView" order="5" />
+      <window_info anchor="right" id="Maven Projects" order="6" />
+      <window_info anchor="right" id="Commander" internal_type="SLIDING" order="7" type="SLIDING" weight="0.4" />
+      <window_info anchor="right" id="Ant Build" order="8" weight="0.25" />
+      <window_info anchor="right" content_ui="combo" id="Hierarchy" order="9" weight="0.25" />
+    </layout-to-restore>
+  </component>
+  <component name="TypeScriptGeneratedFilesManager">
+    <option name="version" value="1" />
+  </component>
+  <component name="VcsContentAnnotationSettings">
+    <option name="myLimit" value="2678400000" />
+  </component>
+  <component name="editorHistoryManager">
+    <entry file="file://$PROJECT_DIR$/README.md">
+      <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
+        <state split_layout="SECOND">
+          <first_editor />
+          <second_editor />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/io/zipcoder/interfaces/Learner.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/test/java/io/zipcoder/interfaces/TestPerson.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="150">
+          <caret line="10" column="9" lean-forward="true" selection-start-line="10" selection-start-column="9" selection-end-line="10" selection-end-column="9" />
+          <folding>
+            <element signature="imports" expanded="true" />
+          </folding>
+        </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="167">
+          <caret line="20" column="54" lean-forward="true" selection-start-line="20" selection-start-column="54" selection-end-line="20" selection-end-column="54" />
+          <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="405">
+          <caret line="27" selection-start-line="27" selection-end-line="27" />
+          <folding>
+            <element signature="e#235#236#0" expanded="true" />
+            <element signature="e#263#264#0" expanded="true" />
+            <element signature="e#231#232#0" expanded="true" />
+            <element signature="e#256#257#0" expanded="true" />
+            <element signature="e#292#293#0" expanded="true" />
+            <element signature="e#316#317#0" expanded="true" />
+            <element signature="e#351#352#0" expanded="true" />
+            <element signature="e#383#384#0" expanded="true" />
+          </folding>
+        </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="315">
+          <caret line="21" column="1" lean-forward="true" selection-start-line="21" selection-start-column="1" selection-end-line="21" selection-end-column="1" />
+          <folding>
+            <element signature="e#260#261#0" expanded="true" />
+            <element signature="e#289#290#0" expanded="true" />
+            <element signature="e#333#334#0" expanded="true" />
+            <element signature="e#361#362#0" expanded="true" />
+            <element signature="e#404#405#0" expanded="true" />
+            <element signature="e#451#452#0" expanded="true" />
+          </folding>
+        </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="90">
+          <caret line="6" column="62" selection-start-line="6" selection-start-column="62" selection-end-line="6" selection-end-column="62" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/test/java/io/zipcoder/interfaces/TestInstructor.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="403">
+          <caret line="47" column="96" selection-start-line="47" selection-start-column="96" selection-end-line="47" selection-end-column="96" />
+          <folding>
+            <element signature="imports" expanded="true" />
+            <element signature="e#164#165#0" expanded="true" />
+            <element signature="e#228#229#0" expanded="true" />
+            <element signature="e#333#334#0" expanded="true" />
+            <element signature="e#355#356#0" expanded="true" />
+          </folding>
+        </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="345">
+          <caret line="23" column="5" lean-forward="true" selection-start-line="23" selection-start-column="5" selection-end-line="23" selection-end-column="5" />
+          <folding>
+            <element signature="e#138#139#0" expanded="true" />
+            <element signature="e#169#170#0" expanded="true" />
+            <element signature="e#203#204#0" expanded="true" />
+            <element signature="e#228#229#0" expanded="true" />
+          </folding>
+        </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="28">
+          <caret line="6" column="60" lean-forward="true" selection-start-line="6" selection-start-column="60" selection-end-line="6" selection-end-column="60" />
+          <folding>
+            <element signature="e#134#142#0" expanded="true" />
+            <element signature="e#486#487#0" expanded="true" />
+            <element signature="e#535#536#0" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+  </component>
+  <component name="masterDetails">
+    <states>
+      <state key="GlobalLibrariesConfigurable.UI">
+        <settings>
+          <splitter-proportions>
+            <option name="proportions">
+              <list>
+                <option value="0.2" />
+              </list>
+            </option>
+          </splitter-proportions>
+        </settings>
+      </state>
+      <state key="JdkListConfigurable.UI">
+        <settings>
+          <last-edited>1.8</last-edited>
+          <splitter-proportions>
+            <option name="proportions">
+              <list>
+                <option value="0.2" />
+              </list>
+            </option>
+          </splitter-proportions>
+        </settings>
+      </state>
+      <state key="ProjectJDKs.UI">
+        <settings>
+          <last-edited>1.8</last-edited>
+          <splitter-proportions>
+            <option name="proportions">
+              <list>
+                <option value="0.2" />
+              </list>
+            </option>
+          </splitter-proportions>
+        </settings>
+      </state>
+      <state key="ProjectLibrariesConfigurable.UI">
+        <settings>
+          <splitter-proportions>
+            <option name="proportions">
+              <list>
+                <option value="0.2" />
+              </list>
+            </option>
+          </splitter-proportions>
+        </settings>
+      </state>
+    </states>
+  </component>
+</project>

interfaces-1.iml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module org.jetbrains.idea.maven.project.MavenProjectsManager.isMavenModule="true" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_5">
+    <output url="file://$MODULE_DIR$/target/classes" />
+    <output-test url="file://$MODULE_DIR$/target/test-classes" />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" scope="TEST" name="Maven: junit:junit:4.12" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.hamcrest:hamcrest-core:1.3" level="project" />
+  </component>
+</module>

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

@@ -0,0 +1,25 @@
+package io.zipcoder.interfaces;
+
+public class Instructor extends Person implements Teacher {
+
+    public Instructor(long id, String name) {
+        super(id, name);
+    }
+
+    public Instructor(long id) {
+        super(id);
+    }
+
+    public void teach(Learner learner, double numOfHrs) {
+        learner.learn(numOfHrs);
+
+    }
+
+    public void lecture(Learner[] learners, double numOfHrs) {
+        double numOfHrsPerLearner = numOfHrs/learners.length;
+
+        for(Learner learner : learners){
+            learner.learn(numOfHrsPerLearner);
+        }
+    }
+}

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

@@ -0,0 +1,5 @@
+package io.zipcoder.interfaces;
+
+public interface Learner {
+    void learn(double numOfHrs);
+}

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

@@ -0,0 +1,38 @@
+package io.zipcoder.interfaces;
+
+import java.util.ArrayList;
+
+public class People {
+
+    ArrayList <Person> personList = new ArrayList<Person>();
+
+    public void add(Person p){
+        personList.add(p);
+        //or
+        //this.personList.add(p)
+    }
+
+//    public long findById(long id){
+//
+//        personList.getId(id);
+////
+//        for (Person p : personList){
+//            if (p.getId() == id){
+//                return p;
+// }
+
+    public void remove(Person person){
+            personList.remove(person);
+        }
+    public void remove (Long id){
+        for (Person p : personList){
+            if (p.getId() == id){
+                personList.remove(p);
+            }
+        }
+    }
+
+    public void removeAll(){
+
+    }
+}

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

@@ -2,4 +2,28 @@ package io.zipcoder.interfaces;
 
 public class Person {
 
+    public final long id;
+    public String name;
+
+    public Person (long id, String name){
+        this.id = id;
+        this.name = name;
+    }
+
+
+    public Person(long id){
+        this.id = id;
+    }
+    public long getId(){
+        return id;
+    }
+
+    public String getName(){
+        return name;
+    }
+
+    public void setName(String name){
+        this.name = name;
+    }
+
 }

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

@@ -0,0 +1,22 @@
+package io.zipcoder.interfaces;
+
+public class Student extends Person implements Learner {
+double totalStudyTime;
+
+public Student (long id, String name){
+    super(id, name);
+    this.totalStudyTime = 0;
+}
+
+public void learn (double mumOfHours){
+    totalStudyTime += mumOfHours;
+}
+
+public double getTotalStudyTime(){
+    return totalStudyTime;
+}
+
+    public void setTotalStudyTime(double totalStudyTime) {
+    this.totalStudyTime = totalStudyTime;
+    }
+}

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

@@ -0,0 +1,8 @@
+package io.zipcoder.interfaces;
+
+public interface Teacher {
+
+    public void teach(Learner learner, double numOfHrs);
+
+    public void lecture(Learner [] learners, double numOfHrs);
+}

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

@@ -0,0 +1,53 @@
+package io.zipcoder.interfaces;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class TestInstructor {
+
+    Instructor instructor = new Instructor(1, "Nhu");
+    Student student = new Student(1, "Nancy");
+    Student student1= new Student(2, "Ron");
+    Student student2= new Student(3, "Ari");
+    Student student3= new Student(4, "Rita");
+
+    Student [] students = new Student[] {student,student1,student2,student3};
+
+
+    @Test
+    public void testImplementation(){
+        Assert.assertTrue(instructor instanceof Teacher);
+    }
+
+    @Test
+    public void testInheritance(){
+        Assert.assertTrue(instructor instanceof Person);
+    }
+
+    @Test
+    public void testTeach(){
+        student.setTotalStudyTime(2.0);
+        instructor.teach(student,50.0);
+
+        double expected = 52.0;
+
+       /* double actual = student.getTotalStudyTime();
+        Assert.assertEquals(expected,actual,0.0);*/
+
+        Assert.assertEquals(expected, student.getTotalStudyTime(), 0.0);
+    }
+
+    @Test
+    public void testLecture(){
+
+        //double numOfHrs = 50;
+
+        instructor.lecture(students, 50.0);
+        double expected = students[0].getTotalStudyTime();
+
+       double actual = 12.5; // numOfHrs instructor taught / # of students taught so 50/4 = 12.5
+
+
+        Assert.assertEquals(expected, actual, 0.0);
+    }
+}

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

@@ -1,5 +1,28 @@
 package io.zipcoder.interfaces;
 
+import org.junit.Assert;
+import org.junit.Test;
+
+
 public class TestPerson {
 
+    Person person = new Person(1, "Nancy");
+
+    @Test
+    public void testConstructor() {
+        long expected = 1;
+        long actual = person.getId();
+        Assert.assertEquals(expected,actual);
+    }
+
+    @Test
+    public void testSetAndGetName() {
+
+        String expected = "Robin";
+        person.setName(expected);
+
+
+        Assert.assertEquals(expected, person.getName());
+
+    }
 }

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

@@ -0,0 +1,46 @@
+package io.zipcoder.interfaces;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class TestStudent {
+    Student student = new Student(1, "Nancy");  //creating global new object
+
+    @Test
+    public void testImplementation() {
+/*
+        //Given
+        boolean expected = true;
+
+        //When
+        boolean actual = student instanceof Learner;
+
+        //Then
+        Assert.assertEquals(expected, actual);*/
+
+        Assert.assertTrue(student instanceof Learner);
+
+    }
+
+    @Test
+    public void testInheritance (){
+
+    Assert.assertTrue(student instanceof Person);
+    }
+
+    @Test
+    public void testLearn(){
+
+        //Given
+
+        double numOfHrs = 10.0;
+        double expected = 10.0;
+
+        //When
+        student.learn(numOfHrs);
+
+        //Then
+        Assert.assertEquals(expected,student.getTotalStudyTime(), 0.0);
+    }
+}
+