QUESTION 4 IMPACT ENGINEERS P/L has just won a bid to build a new plant for a major manufacturing company in Bulawayo. The client needs the plant to commence operations within a year. The work involved is put into project activities as given by the table below: i. Construct a network diagram for this project [5] ii. What is the critical path duration for this job? [5] iii. Determine all the slack times for the non-critical activities [5]