7. (a) The power consumed by a certain processor when executing program A at a rate of 900 million instructions per second is 60 Watt. To reduce the power, the frequency of the processor's clock has been reduced by 10%, what will be the new execution rate of program A? WI (b) The program executes 2.8 billion instructions. Calculate the totol execution time of the program for the base and the reduced frequencies (c) What is the CPI of the processor when executing this program at the base frequency given that this frequency is 2 GHz? What will be the CPI when the frequency is lowered to 1.8 GHz