Write a static method that takes an array list of integers as a parameter and returns a binary search tree composed of the array elements. The method signature is:

public static BST arrayListToBST(ArrayList elements)

then write a static method that takes a binary search tree as a parameter and returns a sorted array list composed of the BST elements. The method signature is:

public static ArrayList bstToSortedArrayList (BST tree)

Finally using the methods implemented above write a static method that takes any array list and returns a sorted array list. The method signature is:

public static ArrayList arrayListToSortedArrayList(ArrayList elements)