9 pts) Exercise 6 Suppose you want to perform two sums: one is a sum of 40 scalar variables, and one is a matrix sum of a pair of two-dimensional arrays, with dimensions 30 by 30. What speed-up do you get with 50 versus 100 processors? Next, calculate the speed-ups assuming the matrices grow to 50 by 50 Suppose you want to achieve a speed-up of 70 times faster with 100 processors. What percentage of the original computation can be sequential