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Walk through the operation of QuickSort when n = 7 and the input array is A...

Walk through the operation of QuickSort when n = 7 and the input array is A = (11, 13, 12, 32, 31, 33, 20).

(a) Count the number of comparisons in the walk through. using LAST ELEMENTS (LAST ANSWER WAS NOT USING LAST ELEMENT AS PIVOT)

(b) Evaluate 7!, lg(7!) and 7 x lg(7).

(c) Construct a best-case example for QuickSort with n = 15.

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