project are listed in the following table:

$\backslash$table$[[,\backslash$table$[[$Normal$],[$Time $($weeks$)]],\backslash$table$[[$Crash$],[$Time $($weeks$)]],\backslash$table$[[$Normal$],[$Cost$]],\backslash$table$[[$Tothith$],[$with$],[$Crashing$]],$Immediate Predecessor$($s$)],[$A$,4,3,$$$2,100,$$$2,700,-],[$B$,2,1,$$$2,200,$$$2,900,-],[$C$,3,3,$$$750,$$$750,-],[$D$,8,4,$$$2,500,$$$2,780,$A$],[$E$,6,3,$$$900,$$$1,275,$B$],[$F$,3,2,$$$3,400,$$$4,600,$C$],[$G$,4,2,$$$1,500,$$$2,000,$D$,$ E$]]$

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