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4) a. Overall speedup if we make 90% of a program run 10 times faster b. Overall speedup if we make 80% of a program run 20% slower. C. You have a system that contains a special processor for doing floating-point operations. You have determined that 50% of your computations can use the floating- point processor. The speedup of the floating pointing-point processor is 15. Calculate overall speedup achieved by using the floating-point processor