Question: ( 2 0 points ) Design a divide - and - conquer algorithm for finding the largest key in a binary tree ( not a

(20 points) Design a divide-and-conquer algorithm for finding the largest key in a binary tree (not a
binary search tree). The algorithm returns the largest key if the tree is not empty; otherwise, returns -1.
a.(5 points) What is the recurrence relationship?
b.(15 points) Code implementation. Find the largest elements in the binary tree shown below. Show the
output.
c. what is the time efficiency class of your algorithm?
( 2 0 points ) Design a divide - and - conquer

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