Consider the comparison tree model, for running merge sort on exactly 4 items. The number of possible input permutations that require exactly 3 comparisons is possible input permutations that require exactly 4 comparisons is of possible input permutations that require exactly 5 comparisons is number of possible input permutations that require exactly 6 comparisons is Type in the integer number as your answer, no spaces, just the number.) The number of The number The