The following table shows orders to be processed at a machine shop as of $8$:$00$ a$.$m$.$ Monday. The jobs have different operations they must go through. Processing times are in days. Jobs are listed In order of arrival.

$\backslash$table$[[$Job$,\backslash$table$[[$Processing$],[$Time $($Days$)]],\backslash$table$[[$Due Date$],[($Days$)]],\backslash$table$[[$Remaining Number$],[$of Operations$]]],[$A$,8,20,2],[$B$,10,18,4],[$C$,5,25,5],[$D$,11,17,3],[$E$,9,35,4]]$

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$0.$ Determine the processing sequence at the first work center using each of these rules: $(1)$ First come, first served, $(2)$ Slack per operation. $($Hint In case of a tle choose the jobs In alphabetical order.$)$

Answer is complete but not entirely correct.

$\backslash$table$[[,],[$Sequence for First come, first served,A$-$B$-$C$-$D$-$E$],[$Sequence for Slack per operation,C$-$A$-$B$-$D$-$E $]]$

b$.$ Compute the effectiveness of each rule using each of these measures: $(1)$ average completion time, $(2)$ average number of jobs at the work center. $($Round your answers to $2$ decimal places.$)$

Answer is complete but not entirely correct.

$\backslash$table$[[,\backslash$table$[[$First Come,$],[$First Served$]],\backslash$table$[[$Slack per$],[$Operation$]]],[$Average completion time,$26\mathrm{.}20$aleph,$26\mathrm{.}20$aleph