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The divide-and-conquer paradigm may be used to perform parallel prefix computation on the PRAM. The problem is composed of two subproblems: computing the odd-indexed results S1,S3,S5, ... and computing the even-indexed results S0, S2,S4, ... The first subproblem is solved as follows. Pairs of consecutive elements in the input list (xo and X1, X2 and x3, x4 and X5, and so on) are combined to obtain a list of half the size. Performing parallel prefix computation on this list yields correct values for all odd-indexed results. The even-indexed results are then found in a single PRAM step by combining each even-indexed input with the immediately preceding odd- indexed result. Complete the code below to perform the above algorithm for the sum computation. forall even numbered processors j, copy X[j] +X[j+1] into S[j/2] m := last index of S[] S : = 1 while (s