2. The following are three different implementations of the same ISA where the instruction set are divided into 3 classes: A, B and C Processor Clock rate CPI of class A CPI of class B CPI of class C P1 3 GHz 2 4 3 P2 2.5 GHz 3 5 3 P3 4 GHz 3 3 2 A program with 5.0E4 instructions is divided into the classes as follows: 40% class A, 35% class B and 25% class C. a) What is the average CPI for each machine? b) Which machine is faster? 3