The following table contains information of four jobs that are awaiting processing at a work center. Assume that jobs are listed in order of arrival. a. Sequence the jobs using (1) SPT, (2) EDD, and (3) CR. [10 marks] b. For each of the methods in part a, determine (1) the average job flow time; (2) the average tardiness, and (3) the average number of jobs at the work center. Which schedule rule should be used under each of the three measures of effectiveness? [15 marks]