Please finish problem number 2

Problem 1 (10 points) Give the prefix, infix and postfix expressions corresponding to the following tree: st A node in the binary tree in problems 2, 3 and 4 below is represented with the following data structure: struct Node int key Node *left, *right; / pointers to the left and right children Problem 2 (20 points) Complete the code of a recursive function removeAllLeaves below that takes a pointer to the root node of a tree T and returns a pointer to the root node of the tree that results from removing all leaves from 7 // remove the leaf nodes from a given tree and return a pointer to the root of the modified tree Node* removeAllLeaves(Node* root) \