Write a recursive private method called countTwoEven Childs 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 it countTwoEvenChildsBT(){

return countTwoEvenChilds(root);

}

Method heading:

private int countTwoEvenChilds(Node node)