Question: On MergeSort: (a) (7%) Explain, using an example, why the Merge Procedure in MergeSort cannot run in-place. (b) (7%) Although MergeSort has a Divide and

On MergeSort: (a) (7%) Explain, using an example, why the Merge Procedure in MergeSort cannot run in-place.

(b) (7%) Although MergeSort has a Divide and Conquer formulation, the actual recursive pseudo-code can be unrolled, so that it can be re-expressed iteratively. Re-write MergeSort using an iterative algorithm, to sort a list of n elements.

(d) (7%) Show that the run-time of Iterative MergeSort is still O(n log n). (e) (7%) In what sense is the variant in (b) more efficient?

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