$7-1.$ The following table contains information concerning four jobs that are awaiting processing at a work center:

JOB Job Processing time

$($days$)$

Due Date

A $1420$

B $1016$

C $724$

D $617$

E $825$

REQUIRED: Sequence the jobs using $($a$)$ FCFS $($assuming the list is by order of arrival$)$ and $($b$)$ SPT

Then for each of the methods, determine $(1)$ the average job flow time, $(2)$ the average tardiness, and the average number of jobs at the work center.

$7-2.$ Use the assignment method to determine the best way to assign workers to jobs, given the following cost information. Then compute the total cost for your assignment plan.

JOB

A

B C

D E

$1$

$54879$

WORKER

$2$

$46358$

$3$

$374610$

$4$

$25585$

$5$

$56493$