has a 3 GHz clock rate and a CPI of 1.5. P2 has a 2.5 GHz clock rate and a CPI of 1.0. P3 has a 4 GHz clock rate and a CPI of 2. (5*3-15) (a) Which processor has the highest performance expressed in instructions per second (b) If the processors each execute a program in 10 seconds, what is the number of cycles and the number of instructions (c) When reducing the execution time by 30% there is an increase of 20% in the CPI. How should the clock rate be changed to obtain the time reduction