1.6 Consider two different implementations of the same instruction set architecture. The instructions can be divided into four classes according to their CPI (class A, B, C, and D). P1 with a clock rate of 2.0 GHz and CPIs of 1, 2, 3, and 4, and P2 with a clock rate of 3.0 GHz and CPIs of 2, 2, 2, and 2. Given a program with a dynamic instruction count of 1.06 instructions divided into classes as follows: 30% class A, 20% class B, 30% class C, and 20% class D, which implementation is faster? a. What is the global CPI for each implementation? b. Find the clock cycles required in both cases