Problem 2 (Design for Performance, Chapter 1) Consider three different processor implementations: P1, P2 and P3 based on the same instruction set architecture. Pl has a 2 GHz clock rate and a CPI of 1.8. P2 has a 2.5 GHz clock rate and a CPI of 2.0. P3 has a 4.0 GHz clock rate and has CPI of 2.5. NOTE: CPU time = Instruction Count x CPI Clock Cycle Time A. Which processor has the highest performance expressed in instructions-per-second (i.e. Instruction Count/CPU Time)? B. If each processor executes a program in 12 seconds, find the number of cycles and the number of instructions executed. c. We are trying to reduce the execution time by 25%, but this can lead to an increase of 15% in CPI. What clock rate should we use to get this time reduction