$($dont use AI$/$copy to get like ty$)$ Four trucks, $1,2,3,$ and $4,$ are waiting on a loading dock at company XYz that has only a single service bay. The trucks are labeled in the order that they arrived at the dock. Assume the current time is $13$:$00.$ The times required to unload each truck and the times that the goods they contain are due in the plant are given in the following table.

$\backslash$table$[[$Truck$,$Unloading Time $($minutes$),$Time Material Is Due$],[1,20,1$:$25$ P$.$M$.],[2,14,1$:$45$ P$.$M$.],[3,35,1$:$50$ P$.$M$.],[4,10,1$:$30$ P$.$M$.]]$

Determine the schedules that result for each of the rules FCFS$,$ SPT$,$ EDD, and $CR.$ In each case compute the mean flow time, average tardiness, and number of tardy jobs.