Q$.3$ Draw AON diagram to represent the following project. Calculate occurrence times of events $($i$.$e$.$ activity times$).$ Determine the critical path and the degree of criticality of other float paths.

$\backslash$table$[[\backslash$table$[[$Activit$],[$y$]],$Description,$\backslash$table$[[$Immediate$],[$Predecessors$]],\backslash$table$[[$Time$],[($weeks$)]]],[$A$,$Build internal components,$-,2],[$B$,$Modify roof and floor,$-,3],[$C$,$Construct collection stack,A$,2],[$D$,$Pour concrete and install frame,A$,$ B$,4],[$E$,$Build high$-$temperature burner,C$,4],[$F$,$Install pollution control system,C$,3],[$G$,$Install air pollution device,D$,$ E$,5],[$H$,$Inspect and test,F$,$ G$,2]]$