5. (15 points) You are going to enhance a computer, and there are two possible improvements: either make multiply instructions run five times faster than before, or make memory access instructions run two times faster than before. Yo repeatedly run a program for which 15% of the time is used for multiplication, 40% for memory access instructions, and 45% for other tasks. (a) what will the speedup be if you improve only multiplication? (b) What will the speedup be if you improve only memory access