Consider the following project $($times given in day:

$\backslash$table$[[$Activity$,$a$,$m$,$b$,$Predecessors$],[$A$,1,4,7,--],[$B$,2,2,2,--],[$C$,2,5,8,$A$],[$D$,3,4,5,$A$],[$E$,4,6,8,$C$,$B$],[$F$,0,0,6,$C$,$B$],[$G$,3,6,9,$D$,$E$]]$

Find:

The network.

$2.$All expected activity times, variances, and slacks

$3.$The critical path and expected completion time

The probability the project will be done in $23$ days.

$5.$The completion time corresponding to $95\%$ probability.