If energy reduction is paramount, how would you change the pipelined design? What is the percentage reduction in the energy spent by an LW instruction after this change?

This exercise explores energy efficiency and its relationship with performance. Problems in this exercise assume the following energy consumption for activity in Instruction memory, Registers, and Data memory. You can assume that the other components of the datapath spend a negligible amount of energy.

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a. b. I-Mem 140pJ 70pJ 1 Register Read 70pJ 40pJ Register Write 60pJ 40pJ D-Mem Read 140pJ 90pJ D-Mem Write 120pJ 100pJ