1.6 [20]1.6 Consider two different implementations of the same instruction set architecture. The instructions can be divided into four classes according to their CPI (classes A, B, C, and D). P1 with a clock rate of 2.5GHz and CPIs of 1,2 , 3 , and 3, and P2 with a clock rate of 3GHz and CPIs of 2, 2, 2, and 2 . Given a program with a dynamic instruction count of 1.0E6 instructions divided into classes as follows: 10% class A, 20% class B, 50% class C, and 20% class D, which is faster: P1 or P2? a. What is the global CPI for each implementation? b. Find the clock cycles required in both cases