experimental model and related data are listed in the following table:

$\backslash$table$[[$Activity$,\backslash$table$[[$Normal$],[$Time $($weeks$)]],\backslash$table$[[$Crash$],[$Time $($weeks$)]],\backslash$table$[[$Normal$],[$Cost$]],\backslash$table$[[$Total Cost$],[$with$],[$Crashing$]],$Immediate Predecessor$($s$)],[$A$,3,2,$$$1,000,$$$1,700,-],[$B$,2,1,$$$2,100,$$$2,800,-],[$C$,1,1,$$$350,$$$350,-],[$D$,7,3,$$$1,500,$$$1,800,$A$],[$E$,6,3,$$$850,$$$1,000,$B$],[$F$,2,1,$$$4,250,$$$5,750,$C$],[$G$,4,2,$$$1,600,$$$2,300,$D$,$ E$]]$

a$)$ Based on the given information regarding the activities for the project, the project completion date $=$ weeks.