Consider the project within the table below.

$\backslash$table$[[$Activity$,$Duration $($days$),$Immediate Predecessors$],[$A$,4,$None$],[$B$,3,$None$],[$C$,6,$A$],[$D$,7,$B$,$ C$],[$F$,1,$D$,$ E$]]$

a$.$ Draw the project network $($using AON notation$)$

b$.$ Calculate the early start $($ES$),$ early finish $($EF$),$ late finish $($LF$)$ and late start $($LS$)$ times of each activity. Compute the slack time at each activity.

c$.$ What is the critical path? What is the duration of the project?