Given the following highway rerouting project,

$\backslash$table$[[$Activity$,\backslash$table$[[$Immediate$],[$predecessor$]],\backslash$table$[[$Activity time$],[($Months$)]]],[$A: Schedule crew,$-,4],[$B: Schedule equipment,$-,6],[$C: Plan new route,A$,2],[$D: Costs meet budget?,B$,6],[$E: Inform public,C$,$B$,3],[$F: Put out signs,C$,$B$,3],[$G: Begin rerouting,D$,$E$,5]]$

a$)$Draw the network diagram$($AOA $,$AON$)($b$)$ Find the ESs, LSs$,$ and slacks. $($c$)$ Find the critical path $($d$)$ If the project has a $11/2-$year deadline for reopening, should we consider crashing some activities? Explain.