A foreman has determined processing times at a work center for a set of jobs and now wants to sequence them. Determine the processing sequence using SPT$,$ EDD and CR$.$ For each sequence compute the average job tardiness and average flow time at the work center.

$\backslash$table$[[$Job$,$Job time $($days$),$Due Date $($days$)],[a,4\mathrm{.}5,10],[b,6,17],[c,5\mathrm{.}2,12],[d,1\mathrm{.}6,27],[e,2\mathrm{.}8,18],[f,3\mathrm{.}3,19]]$