Question $6(10$ points$)$

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Consider the following PERT$/$CPM network with estimated times in weeks

The three$-$time estimate approach was used to calculate the expected times and the following table gives the variance for each activity:

Consider the following PERT$/$CPM network with estimated times in weeks

The three$-$time estimate approach was used to calculate the expected times and the following table gives the variance for each activity:

$\backslash$table$[[$Activity$,$Variance,Activity,Variance$],[$A$,1\mathrm{.}5,$E$,0\mathrm{.}3],[$B$,0\mathrm{.}5,$F$,0\mathrm{.}6],[$C$,1\mathrm{.}2,$G$,0\mathrm{.}6]]$