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(20 pts) In this problem you will be working with a dynamically linked binary search tree (BST). Given a class BSTNode with the following private data members: BSTNode *mpLeft; BSTNode *mpRight; string mData; and the following public member functions: BSTNode (const string &newData) BSTNode *& getLeft) BSTNode*&getRight string getData) and a class BST with the following private data member BSTNode mpRoot; ropriate recursive insertNode ) method that is a member of the BST class. The function ld accept a reference to a pointer ("a) to a BSTNode and a const reference to the data to insert. The function does not need to return a value. However, no makeNode () function exists