write the code for the Avl constructors in c++

AVLTree() - Constructor that takes in no value(s). This creates an empty AVL tree. AVLTree(int) - Constructor that takes in a single integer. The integer will be the first item in the tree(a.k.a. the root). AVLTree(int *, int) - Constructor that takes in two arguments, a pointer to an array of integers and the number of integers in the array(i.e. the size of the array). The constructor will insert all the items from the array into the tree from the array. In other words, the integer in this case is NOT another item. AVLTree() - Constructor that takes in no value(s). This creates an empty AVL tree. AVLTree(int) - Constructor that takes in a single integer. The integer will be the first item in the tree(a.k.a. the root). AVLTree(int *, int) - Constructor that takes in two arguments, a pointer to an array of integers and the number of integers in the array(i.e. the size of the array). The constructor will insert all the items from the array into the tree from the array. In other words, the integer in this case is NOT another item