Assume that a CPU can perform a multiplication operation in 10 ns, an addition operation in I ns, and a n operation in 2 ns. How long wil take for the CPU to calculate the result of mult as add Sub 2(10) + ( /ab-ab-ab-ab 22 ns b. Could you optimize the equation so that it will take less time to execute? d-nbab-ab-ab B. (10 points) Consider the following performance measurements for a program. a. Compute the MIPS ratings and program CPU times of the two computers. Measurement Com r 2 Instruction count Clock rate Cycles per instruction (CPI Computer 1 10 billion 1.0 GHz 6 billion 1.5 GHz Clock ate 15 106 C. State Amdahl's law (5 point) actions D. It is found that in a typical execution of the Spice circuit simulation program 75% of all instructions do floating- point operations. If we add graphics processor units (GPU) to speed up the system, what is the upper bound on the achievable speed up? (5 points)