I really need help with this question. Can you please help me?

Consider two different implementations, P1 and P2 of the same instruction set. There are three classes of instructions (A, B, and C) in the instruction set. P1 has a clock rate of 80 MHz and P2 has a clock rate of 90 MHz. The average number of cycles for each instruction class and their frequencies (for a typical program) are as follows: Instruction Type (Group) Machine P1 - Cycles/ Instruction Machine P2 - Cycles/ Instruction Frequency 45% 20% 35% a) Calculate the average CPI for each machine, P1 and P2. b) Calculate the average MIPS ratings for each machine, P1 and P2. c) What is the relative performance