Using C++ 11 and recursion please!

The AVL class must have the following: A default constructor. A destructor - memory leaks will cost you points an insert function that takes an integer and inserts it into the AVL tree. There will be no duplicates in the tree, if an integer is already present do not add another. This function return type is void. A remove function that removes any node with the given integer from the tree. This function return type is void. A clear function that removes all nodes from the tree. This function return type is void. A serialize function that returns a string representing the tree in a serialized manner. Define the AVL class and define all associated functions in AVL.hpp