parts 1-3 ready

.idea/.name

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+      <state key="ProjectLibrariesConfigurable.UI">
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+</project>

pom.xml

@@ -19,7 +19,6 @@
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
       <version>4.12</version>
-      <scope>test</scope>
     </dependency>
   </dependencies>
 </project>

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

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

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

@@ -1,5 +1,24 @@
 package io.zipcoder.interfaces;
 
 public class Person {
+    final long id;
+    private String name;
+
+    public Person(long id) {
+        this.id = id;
+    }
+
+    public long getId() {
+        return this.id;
+    }
+
+    public String getName() {
+        return this.name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
 
 }

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

@@ -0,0 +1,17 @@
+package io.zipcoder.interfaces;
+
+public class Student extends Person implements Learner{
+    private double totalStudyTime;
+
+    public Student(long id) {
+        super(id);
+    }
+
+    public void learn(double numberOfHours) {
+        this.totalStudyTime += numberOfHours;
+    }
+
+    public double getTotalStudyTime() {
+        return totalStudyTime;
+    }
+}

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

@@ -1,5 +1,24 @@
 package io.zipcoder.interfaces;
 
+import org.junit.Test;
+import static org.junit.Assert.assertEquals;
+
 public class TestPerson {
 
+    @Test
+    public void testConstructor() {
+        Person prsn = new Person(1);
+        long expected = 1;
+        long actual = prsn.getId();
+        assertEquals(expected, actual);
+    }
+
+    @Test
+    public void testSetName() {
+        Person prsn = new Person(1);
+        prsn.setName("Joshua");
+        String expected = "Joshua";
+        String actual = prsn.getName();
+        assertEquals(expected, actual);
+    }
 }

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

@@ -0,0 +1,32 @@
+package io.zipcoder.interfaces;
+
+import org.junit.Test;
+
+import static org.hamcrest.core.IsInstanceOf.instanceOf;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertThat;
+
+public class TestStudent {
+
+    @Test
+    public void testImplementation() {
+        Student stdnt = new Student(5);
+        assertThat(stdnt, instanceOf(Learner.class));
+    }
+
+    @Test
+    public void testInheritance() {
+        Student stdnt = new Student(5);
+        assertThat(stdnt, instanceOf(Person.class));
+    }
+
+    @Test
+    public void testLearn() {
+        Student prsn = new Student(1);
+        prsn.learn(18);
+        prsn.learn(10);
+        double expected = 28;
+        double actual = prsn.getTotalStudyTime();
+        assertEquals(expected, actual, 1e-9);
+    }
+}