Suppose each node in a binary tree is augmented with the number of nodes in its right subtree. Complete the C# method Size which returns the total number of nodes in the binary tree. Assume the following (partial) definitions for Node and BinaryTree. Note: Even though the class Node is private and nested inside BinaryTree, its data members are available to Size.

class BinaryTree { private class Node { public float item; public int numRight; public Node left, right; ... } private Node root; ....  public int Size ( ) { ... }  }