Which of the following instructions is NOT part of the MIPS instruction set, and is merely a pseudoinstruction that will be converted into real MIPS instructions by the assembler? Select one: O a. addi O b. beg O csil d. bit 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 Frequency Machine M1- Cycles/Instruction Class Machine M2 - Cycles/Instruction Class B 1 3 ANN 60% 30% 10% 4 Calculate the average CPI for machine M1. (The answer is numerical value without unit)