Please help I have no idea where to start

You can submit multiple times untilits deadline. The last submission will be graded. No late assignment will be accepted. Show all the steps in your solution including formulas, substituting the correct values and all the intermediate steps to receive full credit. Question 1: Performance The hardware implementation of a program uses three different classes of instructions: 4 of Class A,2 of Class B, and 3 of Class C, that require 1, 7.5, and 2 cycles, respectively (Table below). This program is run on Processor CPU_A which has a clock rate 4.8.GHz and Processor CPU.8 that is 255 slower than CPU A. 1. What is the CPI (cycles per instruction) for the program? 2. What is the execution time for the program on CPU_A? 3. What is the clock cycle time of CPU_B