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Consider two different implementations, M1 and M2, of the same instruction set. There are three classes of instructions (A, B, and C) in the instruction set. M1 has a clock rate of 80 MHz and M2 has a clock rate of 100 MHz. The average number of cycles for each instruction class and their frequencies (for a typical program) are as follows: Instruction Class Machine M1 - Machine M2 - Frequency Cycles/Instruction Cycles/Instruction Class A 2 60% 30% 10% Class B 1 2 4 3 4 Calculate the average CPI for machine M1. (The answer is numerical value without unit)