Assist with the questions below

2 3 5 2 Question 4 Refer to Table I. This table shows your estimates of optimistic, likely and pessimistic durations for package activities to be carried out by your in-house developers. Table 1: Estimated activity times for works Activity Optimistic time Likely time (weeks) Pessimistic time (weeks) (weeks) A-B 2 3 B-C 2 3 B-D 3 4 B-E 2 6 10 C-F 3 5 C-G 2 3 DH 4 5 E-F 10 15 F- 6 10 F-L 2 3 2 3 2 3 3 5 IK 10 16 HK 2 3 K-M 8 12 L-N 3 4 M-N 8 10 Required: 2. Using a programme evaluation and review technique (PERT) approach draw a package schedule showing the activities and critical path. (10 marks) b. Calculate the probability of this particular package being completed by week 55. (5 marks) OONNNMON CDW C. Describe the main stages involved in developing a draft master schedule (DMS) from an initial statement of works (SOW) and suggest which of these stages are likely to prove the most problematic in the context of the case study. (10 marks)