need solution for both questions

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. 5) A program runs in a thousand seconds on a particular machine, with 75% of the time spent doing multiply/divide operations. We want to redesign the machine to provide it with faster multiply/divide hardware. a. How much faster should the multiplier/divider become for the program to run three times as fast? b. What if we want the program to run four times as fast