Question: a) A dummy activity is shown by a dashed arrow in the network diagram. Discuss the purpose of dummy activity in a network diagram? (3)

a) A dummy activity is shown by a dashed arrow in

a) A dummy activity is shown by a dashed arrow in the network diagram. Discuss the purpose of dummy activity in a network diagram? (3) b) Discuss how can a network diagram be useful in project scheduling? (4) c) Discuss the different types of events in a network diagram (Activity on arrow)? (4)

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