Consider a project consisting of 6 activities (A,B,C,D,E,F) with the following precedence relations and time estimates.

(i) Construct an activity - on arc network for the project.

(ii) Determine the Earliest start (ES), the late start, the total float for each activity.

(iii) List the activities on the critical path, and what is the earliest project completion time.

\begin{tabular}{|c|c|c|} \hline Activity & Immediate Predecessors & Duration (Days) \\ \hlineA & & 5 \\ \hlineB & A & 8 \\ \hlineC & B & 10 \\ \hlineD & B & 5 \\ \hlineE & D & 4 \\ \hlineF & C,E & 3 \\ \hline \end{tabular}