Six jobs are assigned to a machine for process. The job information is shown in the table below. The machine processes one job at a time. The manager came up with two job sequences: B-D-F-E-C-A (Sequence 1) and E-F-D-C-A-B (Sequence 2). Job A B C D E F Processing time (hrs.) 10 7 3 15 12 6 Due date (hrs.) 26 19 16 30 30 15 a) Which of the above two sequences results in smaller average tardiness? b) Find a job sequence that gives a smaller average number of jobs compared to the above two sequences