Solve following problems with step-by-step explanations. 1. Our favorite program runs in 20 seconds on computer A, which has a 2.5 GHz clock. We are trying to help a computer designer build a computer, B, which will run this program in 10 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 B to require 1.2 times as many clock cycles as computer A for this program. What clock rate should we tell the designer to target? 2. Suppose we have two implementations of the same instruction set architecture. Computer A has a clock cycle time of 300 ps and a CPI of 2.0 for some program, and computer B has a clock cycle time of 500 ps and a CPI of 1.5 for the same program. Which computer is faster for this program and by how much? 3. A compiler designer is trying to decide between two code sequences for a particular computer. The hardware designers have supplied the following facts: CPI for each instruction class ABC CPI 231 For a particular high-level language statement, the compiler writer is considering two code sequences that require the following instruction counts: Code sequence CPI for each instruction class Which code sequence executes the most instructions? Which will be faster? What is the CPI for each sequence