Calculate each activity's early start, early finish, late start, and late finish.

Calculate the slack time for each activity.

Critical path and length.

\begin{tabular}{|c|c|c|} \hline Activity & ImmediatePredecessor & Duration \\ \hline A & none & 2 \\ \hline B & none & 5 \\ \hline C & A & 3 \\ \hline D & A & 1 \\ \hline E & B & 4 \\ \hline F & B,D & 6 \\ \hline G & C,F & 5 \\ \hline H & E,G & 3 \\ \hline \end{tabular}