2.2 To build a prototype laser scanning machine at Dave Pretorius Corp, the following seven activities are undertaken. The activities are labelled from A to G and their estimated completion times in weeks, variance as well as their predecessor/s are given in the table below. Activities Estimated Variance Immediate predecessors None times A 2 0.12 B None 3 0.12 C A 5 1 D 9 0.12 E 5 1 B,C B,D C,D E,F F 6 0.12 G 2 0.69 Activate Windows Go to Settings to acti(3) Windows. 2.2.1 Determine the projection completion time and the critical path. 2.2.2 Determine the project standard deviation. 2.2.1 Determine the projection completion time and the critical path. (3) 2.2.2 Determine the project standard deviation. (2) 2.2.3 What is the probability that the project will be completed two weeks before the project completion time? (3) 2.2.4 What is the probability that the project will be completed two weeks after the project completion time? (3)