Compilers can have a profound impact on the performance of an application. Assume that for a particular program, compiler A results in an instruction count of 1.0E9 and has an execution time of 2.0 seconds while compiler 2 results in an instruction count of 1.5 E9 instructions and an execution time of 1.8 seconds.

a) Find the average CPI for each program given that the processor has a clock cycle time of 1 nanosecond.

b) A new compiler is developed that generates only 8.0E8 instructions and has an effective CPI of 1.2. What is the speedup of using this new compiler versus using compiler A or B