The below table shows four different processors P1, P2, P3, and P4 running four programs and their corresponding clock rates, Instruction Count (IC), and CPU time are given below. Showing all the steps, answer the following. 2021 Robin Pottathuparambil Page 1 of 2 IC CPU Time 3 us Processor Clock rate P1 1.50 GHz P2 2.00 GHz P3 2.50 GHz 2.00 GHz 4x 103 8 x 103 5 x 103 6 x 103 10 us 4 us P4 8 us a. What is the average CPI for each of the program? (12 Points) b. What is the new clock rate that is required for processors P1, P2, P3, and P4 so that the time spent by the respective program on each of the processors is 6 us? (8 Points)