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2. Consid er three different processor P1, P2, and P3 which are executing on the same instruction set with the following clock rates and CPls Processor Clock Rate CPI 3 GHz 1.5 2.5 GHz 1.0 2.2 P1 P22 4 GHz Table:2 Table 2 processor with clock rate and CPl, here CPI denotes the clock cycles per instruction a) Calculate the performance of each processor. b) If the processor each execute a program in 12s, find the number of cycles and number of instructions. c)) we are trying to reduce the execution time by 20%, but this lead to an increases of 30% in the CPI. what clock rate should we have to get this time reduction