(Q.4) The results of the SPEC CPU2006 bzip2 benchmark running on an AMD Barcelona has an instruction count of 2.389E12, an execution time of 750s, and a reference time of 9650s. 4.a) Find the CPI if the clock cycle time is 0.333ns, and the SPECratio. 4.b) Find the increase in CPU time if the number of instructions of the benchmark is increased by 10% without affecting the CPI. Find the change in the SPECratio for this change. 4.c) Find the increase in CPU time if the number of instructions of the benchmark is increased by 10% and the CPI is increased by 5%. Find the change in the SPECratio for this change. 4.d) Suppose that we are developing a new version of the AMD Barcelona processor with a 4GHz clock rate. We have added some additional instructions to the instruction set in such a way that the number of instructions has been reduced by 15%. The execution time is reduced to 700s and the new SPECratio is 13.7. Find the new CPI. How does this CPI value compare to the original (in 3.a)? Is this change in CPI similar to that on the clock rate? Why? By how much has the CPU time been reduced? (Q.5) A common pitfall is expecting to improve the overall performance of a computer by improving only one aspect of the computer. Consider a computer running a program that requires 280 s, with 80 s spent executing FP instructions, 90 s executing INT instructions, 60 s executing L/S instructions, and 50 s spent executing branch instructions