Question: This section contains two calculation questions.Answer BOTH questions. Each question accounts for 20 marks. Total 40 marks for this section. You MUST show all calculations.

This section contains two calculation questions.Answer BOTH questions. Each question accounts for 20 marks. Total 40 marks for this section. You MUST show all calculations.

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	2	2	2
3-5	4	10	28
4-6	4	10	16
5-6	6	12	30

Find the critical path for the project?

What is the expected project duration? (

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