Answer the following questions.

Show your calculations to get full points.

1. Your favorite program runs in 12 seconds on computer X, which has a 2.2 GHz clock. We are trying to help a computer designer build a computer, Y, which will run this program in 5 seconds. The designer has determined that a substantial increase in the clock rate is possible, but this increase will affect the rest of the CPU design, causing computer Y to require 1.5 times as many clock periods as computer X for this program. What clock speed should we tell the designer to target? (2 points)

2. Suppose there are two implementations of the same instruction set architecture. Computer X has a clock cycle time of 125 ps and a CPI of 2.0, and computer Y has a clock cycle time of 200 ps and a CPI of 1.2 for the same program. Which computer is faster for this program and by how much? (2 points)