<prompt> Kutokana na mizizi ya mti binary, kuangalia kama ni kioo cha yenyewe yaani, symmetric karibu na katikati yake.  <response>: To check whether a binary tree is symmetric or not, we can perform a recursive approach. We check whether the left subtree is a mirror image of the right subtree.For that, we create a helper function which takes two nodes as arguments, and checks whether they are symmetric or not. The base case is reached when both nodes are null, and they are obviously symmetric.Then for each pair of nodes, we check whether their values are the same and whether their left and right subtrees are symmetric or not.Here is the Python code for this approach:def isSymmetricroot: def helperp, q: if not p and not q: return True if not p or not q: return False return p.val q.val and helperp.left, q.right and helperp.right, q.left return helperroot, rootThe function isSymmetric takes the root of the binary tree as input and calls the helper function to check whether the subtrees of both sides are symmetric or not. The helper function returns True if the passed nodes are symmetric and False otherwise. 