Write a method called changeQueue to be considered inside the ArrayQueue class and has one parameter item of type E. Your method will change the queue in such a way that if the the first element of the queue and the last element of the queue are equal, the first and last elements in the queue will be replaced with item, otherwise, do not do any change. Similarly, the same process is done for the second element in the queue and the element before the last in the queue and so on. Assume you have a non-empty queue with even number of elements. You are not allowed to call any method from the the ArrayQueue class. Do not use iterators. Method head: public void changeQueue(E item) Example 1: Before run: front rear "this" queue: 10 29 2 2 5 10 Item1: 100 After run: front rear "this" queue: 100 29 100 100 5 100 Write a recursive private method called countTwoEvenChilds to be included in class BinaryTree as discussed in the lectures. The method counts and returns the number of nodes having two children with even data values in the binary tree. This method is called from a public method countTwoEvenChildsBT. given as follows: public int countTwo EvenChildsBTO% return countTwoEvenChilds(root); 3 Method heading: private int countTwoEvenChilds(Node node)