Suppose that you are a project manager asked to develop the network activity diagram and identify the critical path for a project based on the following information. Draw the activity network as a Gantt chart. What is the expected duration of the project?

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Activity Expected Duration Predecessors 1. Design 3 days 2. Specification 5 days 1 3. Draw up contract 2 days 1,2 4. Client meeting 1 day 2,3 5. Project launch 1 day 4 6. Software development 15 days 3 7. Testing 11 days 8. Refine 5 days 69 6 9. Present to client 1 day 8