Let us consider a comparison-based algorithm for sorting a set of elements. Select all that apply: a. The optimal algorithm for sorting 5 elements requires 10 comparisons b. Sorting 4 elements requires 5 comparisons c. The optimal algorithm for sorting 6 elements can simply be performed by only comparing and exchanging (if necessary) some pairs of elements d. The optimal algorithm for sorting 4 elements can simply be performed by only comparing and exchanging (if necessary) some pairs of elements
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