Code the insert and changeKey methods for the MaxHeap class given. Write JUnit test to test your code

import static org.junit.Assert. import java.util.ArrayList import org.junit.Before: import org junit.Testi public class MaxHeapTest private MaxHeap heap: eBefore public void setUp) throws Exception heap new MaxHeap (10) heap.insert (new Student("Susan", 60, 3.5)) heap.insert (new Student("Ben 70. 3.4)) heap.insert (new Student( "Reed, 120, 4.0)) heap.insert (new student "Johnny",50, 1.2) Test public void test assertEquals (4.0, heap.extractMax().gpa000001) assertEquals (3.5, heap.extractMax().gpa), .000001)