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 ArrayIndexedList ( ) ;

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.print l n( l i s t 1) ;

System.out.print( " Sorted " ) ;

System.out.println( l i s t 2) ;

System.out.print ( " Indexed " ) ;

System.out.println( list3) ;

}

}

l i s t 3. a dd( 0, " a ppl e " ) ;