3 Table 3 gives the durations and immediate predecessors for the five activities of a project.
\begin{table}[h]
| Activity | Duration (hours) | Immediate predecessor(s) |
| A | 3 | - |
| B | 2 | - |
| C | 5 | - |
| D | 2 | A |
| E | 1 | A, B |
\captionsetup{labelformat=empty}
\caption{Table 3}
\end{table}
- Draw an activity-on-arc network to represent the precedences.
- Find the early and late event times for the vertices of your network, and list the critical activities.
- Give the total and independent float for each activity which is not critical.