Draw an arrow diagram for the following project activities and their dependencies: A(2), B(1), C(3) depends on A, D(4) depends on B, E(2) depends on C and D.

a) Draw an arrow diagram for this project

To draw the arrow diagram (Activity-On-Arrow network), we represent activities as arrows and events (start/completion of activities) as nodes. Dummy activities (dashed arrows with 0 duration) are used to maintain correct precedence relationships without representing actual work.

Here's the step-by-step construction:

1. Activities A and B have no predecessors, so they start from the initial node (Node 1).
   • Node 1 $\xrightarrow{\text{A (2)}}$ Node 2
   • Node 1 $\xrightarrow{\text{B (1)}}$ Node 3
2. Activity C depends on A.
   • Node 2 $\xrightarrow{\text{C