Write a method deleteBack that deletes the last value (the value at the back of the list) and returns the deleted value. If the list is empty, your method should throw a NoSuchElementException.

ListNode below:

private static class ListNode { public E data; // data stored in this node public ListNode next; // link to next node in the list public ListNode prev; // link to previous node in the list // post: constructs a node with given data and null links public ListNode(E data) { this(data, null, null); } // post: constructs a node with given data and given links public ListNode(E data, ListNode next, ListNode prev) { this.data = data; this.next = next; this.prev = prev; } }