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Assume that a program has 410,000 instructions. There are 4 instruction classes in the program, and each class requires a certain number of clock cycles to execute, as shown below. a) If the program execution time is 6.28s, what is the clock cycle of the computer? At what frequency does the computer run? b) How much does the CPI for the Store instructions have to be reduced to gain 10% reduction in execution time? c) Assume that a computer system has a multi-core processor that can be used to solve a problem in parallel. 96% of the code is parallelizable. How many cores are needed for the system to achieve a speedup of 5