Let us apply the SPEC CPU2017 benchmark to a 1.8 GHz processor. The execution time is 2,000 ns, for the benchmark average CPI of 2. a) If the execution time is reduced by 10%, but CPI remains same, and the benchmark runs on a 2 GHz processor instead, what is the instruction count in this case? b) We want to reduce the execution time by another 16%, but maintain the number of instructions found in question a) and the same CPI. What clock frequency do we need to achieve that