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

a. Draw a network diagram for the activities.

b. Calculate the earliest expected completion time.

c. Show the critical path.

d. What would happen if activity 6 were revised to take 6 weeks instead of 2 weeks?

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Activity No. Immediate Activity Time (weeks) Predecessors 1 Collect requirements 3 2 Analyze processes 2 1 3 Analyze data 2 2 4 Design processes 6 2 5 Design data 3 3 6 Design screens 2 3,4 7 Design reports 4 4,5 8 Program 5 6,7 9 Test and document 10 Install 72 7 8,9