<prompt> Kwa kuwa mti binary, kuamua kama ni halali binary search mti BST. BST ni ilivyoelezwa kama ifuatavyo: kushoto subtree ya node ina nodes tu na funguo ndogo kuliko muhimu node. haki subtree ya node ina nodes tu na funguo kubwa kuliko muhimu node. wote kushoto na kulia subtrees lazima pia kuwa binary search miti. Kwa mfano, kama mti wa input ni 2,1,3, pato lazima kuwa kweli. kama mti input ni 5,1,4,null,null,3,6, pato lazima kuwa uongo.  <response>: To determine if a binary tree is a valid binary search tree, you can perform an inorder traversal of the tree and check if the resulting list of nodes is sorted in ascending order. If it is, then the tree is a valid binary search tree; otherwise, it is not. Here is a sample code in Python:class Solution: def isValidBSTself, root: TreeNode - bool: stack, inorder , float-inf while stack or root: while root: stack.appendroot root root.left root stack.pop if root.val inorder: return False inorder root.val root root.right return TrueIn this code, the isValidBST function takes a root node of a binary tree and returns a boolean value indicating whether the tree is a valid binary search tree or not. The function performs an iterative inorder traversal of the tree using a stack. It keeps track of the previous node value in the inorder sequence inorder and checks if the current nodes value is greater than the previous value. If it is not, the function returns False. If the entire traversal is completed without any violation of the ordering rule, the function returns True. 