8. (10 points) The production manager must determine the processing sequence for four jobs through two workstations. The same sequence will be followed in both departments. The manager's goal is to move the jobs through the two departments as quickly as possible. A job must be completed at workstation A before the job moves on to the workstation B. The job times at workstation A and workstation B are given in the table below: Workstation A Workstation B ONWN a. (4 points) Find the sequence that will minimize total completion time. b. (6 points) Fill the Gantt chart below to determine the makespan for the four jobs and the amount of idle time at workstation B. Time 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 0 Workstation A Workstation B Time 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22