THREE [25] 3.1 Sitholes Construction is planning a project and the details are listed in the table below: Activity Predecessor Most Optimistic Most likely Most Pessimistic Time in days a - 3 6 8 b - 2 4 4 c - 1 2 3 d a, b 6 7 8 e c 2 4 6 f e 6 10 14 g e 1 2 4 h d 3 6 9 i g, h 10 11 12 j f, g 14 16 20 3.1 Using the PERT formula, calculate the time (t) and variance (v) values. (5) 3.2 A business is launching a new product. The launch will require a number of related activities as follows: - Hire a sales manager (5 weeks) - Require the sales manager to recruit sales people (4 weeks) - Train the sales people (7 weeks) - Select an advertising agency (2 weeks) - Plan an advertising campaign with the agency (4 weeks) - Conduct the advertising campa