super confused, please answer and explain

Homework 1 CIS 350: Data Structures and Algorithm Analysis Winter 2019 6. [15 pts.] Consider a version of a binary search tree (BST) for sorted maps with integer keys that stores additional information as data members of each node w of the tree to account for the smallest and largest integer keys in the subtree rooted at w. Suppose that we can access this information using w.min, for the smallest integer key, and w.mar, for the largest. Algorithm 4 provides the pseudocode for the constructor of a node in a binary tree with the additional information. Algorithm 4 Node(k, v,left, right, parent) 1: w new node 2: w.key w.max then return NULL 4: if k w.mar then 6: 7: if k w.max then return NULL 4: if k w.mar then 6: 7: if k