The following information is provided by a contracting company, contracted to build

economy houses by the government of Botswana. As a consultant, study the information

and use it to answer the following questions raised.

Activity Duration (Days) Direct cost (P)

Activity Name Normal Crush Normal Crush

1-2 Trench 12 10 3,600 3,880

1-4 Footing 18 14 4,600 5,000

1-3 Foundation 9 6 2,600 3,200

2-4 3 course 7 6 1,800 1,950

2-5 Window level 12 10 3,000 3,240

4-5 Roof level 13 9 36,000 4,240

3-5 Roofing 7 5 1,900 2,400

21,100 23,910

a) Prepare the network diagram of a project and show the critical path. (7 marks)

b) Calculate the normal cost to complete the project if the fixed cost amounts to

P200/day. (2 marks)

c) Calculate the minimum cost of the project if it is to be completed in 22 days.

(11 marks)