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Consider each of the choices below and a program P to be run on computer system X. Independently implementing each of these may or may not decrease tcpu(user),X(P). Select all which are guaranteed to decrease the time to execute P in all cases. Modify the compiler so the static instruction count of P is decreased. Redesign the CPU to decrease the CPI of P. Modify the compiler so the static instruction count of P is increased. Redesign the CPU to increase the CPI of P. Modify the hardware to decrease the clock frequency. Modify the hardware to increase the clock period