Consider two different implementations M1 (1.5 GHz) and M2 (2 Ghz) of the same instruction set. There are three classes of instructions with following CPIS I. II. III. IV. Class CPI for M1 CPI for M2 A 2 2 B 2 3 5 4 What are the peak performances of M1 and M2? Show that if 50% of the instructions executed in a certain program are from class B and rest are divided equally among remaining classes, then which machine is faster and by what factor? What is the effect if composition of the program is changed such that all the instructions are divided equally among all the classes? We redesign the machine M1 such that with negligible cost increase the CPI for class C instructions improved from 5 to 3, CPI for all other instruction classes remained unchanged. What should be the minimum percentage of class C instructions for 20% improvement in the performance?