Draw the recursion tree when n = 8, where n represents the length of the array, for the following recursive method: int sum(int[] array, int first, int last) { if (first == last) return array[first]; int mid = (first + last) / 2; return sum(array, first, mid) + sum(array, mid + 1, last); } · Determine a formula that counts the numbers of nodes in the recursion tree. · What is the Big-Q for execution time? · Determine a formula that expresses the height of the tree. · What is the Big-Q for memory? · Write an iterative solution for this same problem and compare its efficiency with this recursive solution.
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