2 - Consider two machines with two different instruction sets. Machine A has a 4 GHz clock and machine B has a 2 GHz clock. The following measurements are recorded upon execution of a program. Machine A Instruction Class Load/Store 3 Arithmetic 8 Branch 7 Instruction Count (millions) CPI 5 9 1 Machine B Arithmetic Instruction Class Load/Store 6 Branch 5 2 Instruction Count (millions) CPI 3 8 1 2-(3 points) For Machine A what is the average CPI? 3-(3 points) For Machine B, what is the average CPI? 4-(4 points) What is the execution time for each machine and which is faster