Assume for arithmetic, load/store, and branch instructions, a processor has cpis of 1, 12, and 5, respectively. also assume that on a single processor a program requires the execution of 2.56e9 arithmetic instructions, 1.28e9 load/store instructions, and 256 million branch instructions. assume that each processor has a 2 ghz clock frequency. assume that, as the program is parallelized to run over multiple cores, the number of arithmetic and load/store instructions per processor is divided by 0.7 × p (where p is the number of processors) but the number of branch instructions per processor remains the same. a. find the total execution time for this program on 1, 2, 4, and 8 processors, and show the relative speedup of the 2, 4, and 8 processors result relative to the single processor result.