The following table contains information concerning four jobs that are awaiting processing at a work center.

Job Job Time $($days$)$ Due Date

$($days$)$

A $1420$

B $1016$

C $715$

D $617$

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a$.$ Sequence the jobs using $(1)$ FCFS$,(2)$ SPT$,(3)$ EDD, and $(4)$ CR$.$ Assume the list is by order of arrival.

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. $($Round your intermediate calculations and final answers to $2$ decimal places.$)$