6. You a given a non-pipelined processor which has a cycle time of 20 ns and an average CPI of 1.5 Assume pipelining changes the CPI to 1. Calculate the latency speedup in the following questions. (19 pts) a. What is the ideal speedup you can get by using a standard 5-stage pipeline? (4 pts) b. If the 5 stages take 1ns, 1.5ns, 4ns, 4ns, and 1ns, what is the best speedup you can get compared to the original unpipelined processor? (5 pts) If each pipeline stage added 50 ps due to register setup delay, what is the best speedup you can get compared to the original processor? (5 pts) c. d. The pipeline in part c. stalls 20% of the time for 1 cycle and 5% of the time for 2 cycles (unrelated occurrences). What is the new CPI? What is the speedup compared to the original unpipelined processor? (5 pts)