Consider three different processors P1, P2, and P3 executing the same instruction set. P1 has a 3.5 GHz clock rate and a CPI of 2.75. P2 has a 2.75 GHz clock rate and a CPI of 2.25. P3 has a 2.0 GHz clock rate and has a CPI of 1.75. (Question derived from question 1.5 in "Computer Organization and Design") a. Which processor has the highest performance expressed in Instructions per second? (Answer should be P1, P2, or P3) b. If the processors each execute a program in 5 seconds, find the number of instructions that each processor performs in these 5 seconds. The answer format should be X.XX x 10^y. Please use this format exactly. For processor P1? For processor P2? For processor P3? We are trying to decrease the execution time of P2 by 30% (70% of the original time) with a 20% increase in clock frequency. What must P2's CPI become to get this 30% increase with a 20% increase in frequency? (Answer should be in the format X.XX)