Q4.(20 pts) 3 instructors are working together to grade test papers. The test contains 10 questions. Every instructor takes 2 minutes to grade each question. The instructors split the questions among them. For example, instructor 1 takes questions 1 and 2, instructor 2 takes 3, 4, 5, 6, instructor 3 takes 7,8,9,10. They work with each other in a pipelined fashion. (a) How should they split the questions among them (instead of the split given above) so that the throughput is th fastest and what is the throughput in that case in terms of test papers graded per hour? (b) What is the latency in that case? (c) What would be the latency and throughput if the split of questions was 1-2, 3-516-10? (d) How long would it take to grade 62 test papers? be