Please answer all questions.

1. What is the average CPI of a 1.4 GHz machine that executes 12.5 million instructions in 12 seconds? 2. What is the CPI of a program execution that consists of the following instruction types (classes) and CPI: Instruction class CPI Percentage A 1.4 25% B 2.4 70% 2 5% 3. Suppose one machine, A, executes a program with an average CPI of 1.9. Suppose another machine, B (with the same instruction set and an enhanced compiler), executes the same program with 20% less instructions and with a CPI of 1.1 at 800MHz. In order for the two machines to have the same performance, what does the clock rate of the first machine need to be