(Amdahl's law - partial improvement] Consider a computer running a program that requires 250 s, with 70 s spent executing FP instructions, 85 s executed L/S (Load /Store) instructions, and 40 s spent executing branch instructions. a. By how much is the total time reduced if the time for FP operations is reduced by 20%? b. By how much is the time for INT operations reduced if the total time is reduced by 20%? C. Can the total time be reduced by 20% by reducing only the time for branch instructions