Question: 2. The following instructions are executed on a CPU which has R = 23 and PC = 10 for each instruction. The instructions each occupy

2. The following instructions are executed on a CPU which has R = 23 and PC = 10 for each instruction. The instructions each occupy two memory locations and set AC to the value shown. What are the contents of memory locations 21, 22, and 23? a) LDAC $10 sets AC = 32 b) LDAC @R sets AC = 21 c) LDAC @23 sets AC = 54 3. Show the code to perform the computation X = (A + B) * C*(D+E) using microprocessors which use the instruction formats shown below. Do not modify the values of A, B, C, D and E. If necessary, use temporary location T to store intermediate results. a) 3-operand instructions b) 2-operand instructions c) 1-operand instructions d) O-operand instructions

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