Task time estimates for the modification of an assembly line at Jim Goodale's Carbondale, Illinois, factory are as follows:

$\backslash$table$[[$Time$,,],[$Activity$,\backslash$table$[[$Tim hours$)],[($inted$]],$Immediate Predecessor$($s$)],[$A$,6\mathrm{.}0,-],[$B$,7\mathrm{.}5,-],[$C$,5\mathrm{.}0,$A$],[$D$,7\mathrm{.}0,$B$,$ C$],[$E$,4\mathrm{.}8,$B$,$ C$],[$F$,8\mathrm{.}1,$D$],[$G$,5\mathrm{.}0,$E$,$ F$]]$

This exercise contains only part a$.$

a$)$ The correct precedence diagram for the project is shown in

Figure $3$

Figure $1$