What is a project network diagram? Explain the concept of forward planning and backward planning and state: Project Management for Professional MBA Coursework, UTM, Malaysia

A project has been defined to contain the following list of activities along with their requirements for completion.

1. Draw a network diagram for the activities.
2. Calculate the Early Start (ES) and Early Finish (EF) using a forward pass in your calculation, draw the diagram, and plot the figures.
3. Calculate the Late Start (LS) and Late Finish (LF) using a backward pass in your calculation, draw the diagram, and plot the figures.
4. Calculate the earliest expected completion time (weeks).
5. Show the critical path.
6. What would happen if activity F were revised to take six (6) weeks instead of two weeks?