Use the network diagram to answer the questions below:

1. Determine ES, EF, LS, LF and slack for each activity.
2. What is the expected completion time for the project?
3. Find the critical path for the network.
4. State the non-critical activities.
5. Explain what it means if an activity has a slack of zero.
6. Explain what it means if an activity has a slack of non-zero.