Your friend is a crack circuit designer. She has offered to redesign one of the units in the single-cycle MIPS processor to have half the delay. Using the delays from Table 7.6, which unit should she work on to obtain the greatest speedup of the overall processor, and what would the cycle time of the improved machine be??

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Table 7.6 Delays of circuit elements Element Parameter Delay (ps) register clk-to-Q tpeg 30 register setup tsetup 20 multiplexer tmux 25 ALU TALU 200 memory read tmem 250 register file read trFread 150 register file setup tRFsetup 20