(a) Program execution time, T, as defined in Section 1.6.2, is to be examined for a certain high-level language program. The program can be run on a RISC or a CISC computer. Both computers use pipelined instruction execution, but pipelining in the RISC machine is more effective than in the CISC machine. Specifically, the effective value of S in the 7 expression for the RISC machine is 1.2, but it is only 1.5 for the CISC machine. Both machines have the same clock rate, R. What is the largest allowable value for N, the number of instructions executed on the CISC machine, expressed as a percentage of the N value for the RISC machine, if time for execution on the CISC machine is to be no longer than that on the RISC machine?

(b) Repeat Part a if the clock rate, R, for the RISC machine is 15 percent higher than that for the CISC machine.

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