Show the output of the following program:

import ch06.lists.*;

public class ListExer { public static void main (String[] args) { ListInterface list1 = new ArrayUnsortedList (); list1.add(apple); list1.add(peach); list1.add(orange); list1.add(pear); list1.remove(peach);

ListInterface list2 = new ArraySortedList(); list2.add(apple); list2.add(peach); list2.add(orange); list2.add(pear); list2.remove(peach);

IndexedListInterface list3 = new ArrayIndexList(); list3.add(0, apple); list3.add(0, peach); list3.add(1, orange); list3.add(0, pear); list3.add(2, plum); list3.remove(peach);

System.out.print(Unsorted);

System.out.println(list1);

System.out.print(Sorted);

System.out.println(list2);

System.out.print(Indexed);

System.out.println(list3);