When running the SPEC CPU2006 bzip2 benchmark, processor P performed 2.148E12 instructions. This required 705s. The reference time was 9650s. a) How was the reference time calculated? b) Find the CPI if the clock cycle time is 0.333 ns. c) Find the SPECratio. d) Find the increase in CPU time if the number of instructions in the benchmark is increased by 10% without affecting the CPI. e) Find the increase in CPU time if the number of instructions in the benchmark is increased by 10% and the CPI is increased by 5%. f) Find the change in the SPECratio caused by the change in part (e) g) Suppose we develop a new version of processor P with a 4GHz clock rate. The instruction set has been modified and as a result the number of instructions performed has been reduced by 12%. The execution time is reduced to 690s, and the new SPECratio is 13.4. Find the new CPI. h) Is the change in CPI proportional to the change in the clock rate? Explain why this is so. i) By how much has the CPU time been reduced