You have prepared the following schedule for a project in which the key resource is a tractor$($s$).*$ There are three tractors available to the project. Activities A and D require one tractor to complete, while activities B$,$ C$,$ E$,$ and F require two tractors.

Develop a resource$-$constrained schedule in the loading chart that follows. Use the parallel method and heuristics given. Be sure to update each period as the computer would do$.$ Record the early start $($ES$),$ late finish $($LF$),$ and slack $($SL$)$ for the new schedule