Now look at MPI code and estimate overhead for a computer where a single call to MPI_RECV or MPI_SEND takes 20 microseconds. Assume the other MPI calls used take ZERO time.What value of N (points per processor now) gives speed-up > 8 on 10 processors if these processors each have performance of sequential machine you used. Note the total problem size is 10N now and the "reduction" algorithm in code on web is not optimal; however use this simple approach.