Need some help coding this extended array list. This file describes a class that extends (that is, subclasses) ArrayList, adding several instance methods. Implement each method as described. Thank You!

package list.exercises;

import java.util.ArrayList;

import java.util.List;

@SuppressWarnings("serial")

public class ExtendedArrayList extends ArrayList {

/**

* Counts the number of elements in this list that are equal to e.

*

* Uses .equals to check for equality.

*

* @param e the element to count

* @return the number of elements equal to e

*/

public int count(E e) {

return 0;

}

/**

* Rotates the list right n places.

*

* Rotating a list right means moving the last item to the front of the list:

*

* 1, 2, 3, 4, 5 when rotated right once becomes 5, 1, 2, 3, 4

*

* A list is rotated right two places as follows:

*

* 4, 5, 1, 2, 3

*

* and so on.

*

* @param n the distance to rotate the list right

*/

public void rotateRight(int n) {

}

/**

* Intersperses e between each existing element of the list.

*

* For example, given the list: "hey", "ho", "hi", if we intersperse "yo" we get:

* "hey", "yo", "ho", "yo", "hi"

*

* @param e the element to intersperse

*/

public void intersperse(E e) {

}

/**

* Returns a copy of this list in reverse order.

*

* This list is unmodified by this operation.

*

* @return a reversed copy of the list

*/

public List reversed() {

return null;

}

}

ExtendedArrayList.test

/* * Copyright 2017 Marc Liberatore. */

package list.exercises;

import static org.junit.Assert.*;

import java.util.ArrayList; import java.util.Arrays; import java.util.List;

import org.junit.Before; import org.junit.Rule; import org.junit.Test; import org.junit.rules.Timeout;

public class ExtendedArrayListTest {

// Uncomment these two lines if you want to catch infinite loops // @Rule // public Timeout globalTimeout = Timeout.seconds(10); // 10 seconds

ExtendedArrayList