Algorithms.

Consider the following algorithm to find the heaviest ball:

I. Divide the n balls into n/2 pairs of balls

II. Compare each ball with its pair, and retain the heavier of the two

III. Repeat this process until just one ball remains

Question: Utilizing "Repechage" method sports use, find the second heaviest ball, using log_2(n) additional comparisons. Simply write out the steps of the algorithm like the one above.