$($a$)$ Construct an Activity$-$on$-$branch Network from the precedence relationships of activities shown.

$($b$)$ Calculate the Forward & Backward Pass and present the results in a tabular form $($Given: Duration of Project $=44$ days$).$

$($c$)$ Calculate the Critical Path.

$\backslash$table$[[$Activity$,$Predecessors,Duration$],[$A$,-,6],[$B$,$A$,7],[$C$,-,14],[$D$,$A$,1],[$E$,$B$,5],[$F$,$C$,$D$,8],[$G$,$C$,$D$,9],[$H$,$G$,3],[$I$,$H$,5],[$J$,$F$,3],[$K$,$E$,$J$,4],[$L$,$F$,12],[$M$,$L$,$I,$5],[$N$,$L$,$I,$3],[$O$,$K$,$N$,7]]$