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Question 4 (20 marks) A building project consists of seven activities whose precedence relationship and time estimates are listed as follows: Activity Estimated Duration (in

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Question 4 (20 marks) A building project consists of seven activities whose precedence relationship and time estimates are listed as follows: Activity Estimated Duration (in months) Optimistic Most Likely Pessimistic 1-2 2 2 14 1-3 2 8 14 1-4 4 4 16 2-5 N N 2 3-5 4 10 28 4-6 4 10 16 5-6 6 12 30

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