QI. An engineering project is being planned using Project Network Techniques, and the precedence diagram attached as Figure la has been prepared to show the sequence of logic. The duration of each activity is shown in the standard position, quoted in weeks Lags with durations also given in weeks are shown applied to two dependencies. Complete the precedence diagram (Figure la) by adding the full analysis of start and finish times (early and late), and total float in the appropriate places (20 marks) b) Indicate the critical path on the diagram. (20 marks) Start 19 49 41 74 10 60 90 100 76 80 16 19 30 50 96 94 97 20 70 40 1