$8\mathrm{.}4$ The processing times $($ including set up time $)$ for five jobs to be processed at a work center are given as follows:

$\backslash$table$[[$Job$,$Processing time $($days$),$due dates$],[$A$,,],[$B$,5,8],[$C$,2,5],[$D$,4,6],[$E$,12,15],[,8,10]]$

Assume jobs arrived in the order as shown

Using each of the following priority rules for job sequencing

A$)$ First come, first served $($FCFS$)$

B$)$ Shortest processing time $($SPT$)$

C$)$ Earliest due date $($EDD$)$

Determine the sequence of jobs.

Determine the average flow time

Determine the average tardiness

Determine the average number of jobs at the work station $($The makespan is $51$ days$)$