6.4 Anay-Based Implementations 18. Show the output of the following program: import ch06. lists. *; public class Li st Exer { public static void main(String[] args) { Li st Interface list1 = new Array UnsortedLi st(); list 1. add("apple"); list 1. add("peach"); list 1. add("orange"); list 1. add("pear"); list1.remove("peach"); Li st Interface list 2 = new Array SortedLi st(); list 2. add("apple"); list 2. add("peach"); list 2. add("orange"); list 2. add("pear"); list 2. remove("peach"); IndexedList Interface list3 = new ArrayIndexedLi st