Assume that the activities in Problem $3\mathrm{.}11$ have the

following costs to shorten: A$,$ $$300/$week; B$,$ $$100/$week; C$,$ $$200/$

week; E$,$ $$100/$week; and F$,$ $$400/$week$.$ Assume also that you can

crash an activity down to $0$ weeks in duration and that every week

you can shorten the project is worth $$250$ to you. What