Questions: ```import java.util.LinkedList; import java.util.List; import java.util. IistIterator; public class Numbers public static void main(String[] args) IinkedList<Integer> numbers = new LinkedList<Integer>(); ListIterator<Integer> numIter; int nextNum; numbers.add(13); numbers.add (12); numIter = numbers.listIterator(); numIter.next(); numIter.add(11); numIter = numbers.listIterator(); while (numIter.hasNext()) nextNum = numIter.next(); System.out.println (nextNum); ```

Solution Steps

The program begins by importing the necessary classes from the java.util package:

import java.util.LinkedList;
import java.util.List;
import java.util.ListIterator;

A LinkedList of integers named numbers is created, and a ListIterator named numIter is initialized to iterate over the list:

LinkedList<Integer> numbers = new LinkedList<Integer>();
ListIterator<Integer> numIter;
int nextNum;

Two integers, 13 and 12, are added to the numbers list:

numbers.add(13);
numbers.add(12);

The ListIterator is used to traverse the list. The iterator moves to the next element and then adds the integer 11 after the first element:

numIter = numbers.listIterator();
numIter.next();
numIter.add(11);

A new ListIterator is created to iterate through the modified list. The program prints each element in the list:

numIter = numbers.listIterator();
while (numIter.hasNext()) {
    nextNum = numIter.next();
    System.out.println(nextNum);
}

Final Answer

13
11
12