What is the "critical path" duration route?

$\backslash$table$[[$Task$,$Immediate Predecessor,Duration$],[$A$,$None,$],[$B$,$None,$],[$C$,$None,$],[$D$,$A$,],[$E$,$C$,],[$F$,$A$,],[$G$,$B$,$D$,$E$,]]$

Start $BDG$ Finish

Start $CEG$ Finish

Start $BG$ Finish

Start $AF$ Finish

Start $ADG$ Finish