Kimpel Products makes pizza ovens for commercial use. James Kimpel, CEO, is contemplating producing smaller ovens for use in high school and college kitchens.

The activities necessary to build an experimental model and related data are listed in the following table:

$\backslash$table$[[,\backslash$table$[[$Normal$],[$Time $($weeks$)]],\backslash$table$[[$Crash$],[$Time $($weeks$)]],\backslash$table$[[$Notal Cost$],[$with$],[$Cost$]],\backslash$table$[[$with$],[$Crashing$]],$Immediate Predecessor$($s$)],[$A$,3,2,$$$1,200,$$$1,800,-],[$B$,2,1,$$$2,300,$$$3,000,-],[$C$,1,1,$$$400,$$$400,-],[$D$,7,3,$$$1,400,$$$1,720,$A$],[$E$,6,3,$$$850,$$$1,075,$B$],[$F$,2,1,$$$4,000,$$$5,000,$C$],[$G$,4,2,$$$1,500,$$$2,200,$D$,$ E$]]$

a$)$ Based on the given information regarding the activities for the project, the project completion date $={?}^{-}$weeks.