$.\mathrm{.}33\mathrm{.}31$ Development of Version $2\mathrm{.}0$ of a particular accounting software product is being considered by Jose Noguera's technology firm in Baton Rouge. The activities necessary for the completion of this project 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$[[$CRASH$],[$COST$]],\backslash$table$[[$IMMEDIATE$],[$PREDECESSOR$($S$)]]],[$A$,4,3,$$$2,000,$$$2,600,-],[$B$,2,1,2,200,2,800,-],[$C$,3,3,500,500,-],[$D$,8,4,2,300,2,600,$A$],[$E$,6,3,900,1,200,$B$],[$F$,3,2,3,000,4,200,$C$],[$G$,4,2,1,400,2,000,$D$,$ E$]]$