A) If we calculate a speedup of 2 with 5 processors, and use of each processor costs $2 per hour, how much extra money are we paying to save a hour of computation time by using 5 processors instead of

A) If we calculate a speedup of 2 with 5 processors, and use of each processor costs $2 per hour, how much extra money are we paying to save a hour of computation time by using 5 processors instead of one?

B) Suppose the sequential part of a program accounts for 18% of the program’s computation time. You are executing on a machine with n processors. How many processors would it take to double the speedup? Of course, your answer should be in terms of n.