Show your work! Two machines A and B implement the same Instruction Set Architecture(ISA), which has classes of instructions, 1, 2 and 3. Processor A clocked at the same rate, 5GHz. The CPI for each machine A and B is given in the following table for each class of instructions: three is cheaper to produce. Both processors are processor class 1 class 2 4 4 class 3 5 2 If the average mix of instructions executed when running a popular software package is 5 parts class 1 to 2 parts class 2 to 3 parts class 3 a) (6 points) what is the average CPI for each machine when running this program? b) (3 points) which machine is faster? c) (3 points) by how much? (You can express this as a ratio) An engineer has found a "trick" that enables the slower pr ocessor to be clocked at 7GHz. The CPI for each class of instruction is unchanged. d) (3 points) What is the average CPI for the [previously] slower machine now? e) (3 points) Which machine is faster now? f) (6 points) By how much? (Again, you can express this as a ratio)