Part D. ​. For questions 7,8,9, consider a queuing system with one queue and two servers in series. Question 7. Consider a queuing system with one queue and two servers in series. How many statements are correct? 0123 (A) Johnson's rule is a priority rule for a single queue and single server. (B) The concept of Johnson's rule is the jobs with the smallest time on the first server is scheduled early in the schedule and the jobs with the smallest time on the second server is scheduled late in the schedule. (C) For the Johnson's rule, the total processing time is minimized in the schedule.