(b) Consider two CPUs P1 and P2, each implementing the same ISA and executing a program P. Program P comprises four classes of instructions: A, B, C, and D. The clock frequency of each CPU and CPI for each instruction class for each CPU is given in the table. i. Suppose program P comprises 10M instructions with the following instruction frequencies: 10% class A, 20% class B, 50% class C, and 20% class D. Which CPU implementation is faster? ii. Compute is the overall average CPI for program P for each CPU implementation. iii. Compute the total clock cycles required to execute program P for each CPU implementation