3. Consider two different implementations, PI and P2, of the same instruction set. There are five classes of instructions (A, B, C, D and E) in the instruction set. P1 has a clock rate of 4 Ghz. P2 has a clock rate of 6 Ghz. The average number of eycles for each instruction class for Pl and P2 is as follows: Class CPI on P1 CPI on P2 If the number of instructions executed in a certain program is divided equally among the classes of instructions except for class A, which occurs twice as often as each of the others, how much faster is P2 than P1? (hint: find the frequencies for each instruction class to calculate the average CPI) a) b) Assuming the CPI values from (a), at what clock rate would P1 have the same performance as the 2 Ghz version of P2