This question is about (project management) please, l need an answer as soon as possible, and Thank you for helping me .

2: For the following Table: Preceded by To Sd V ES LE TS C.P Activities A To 5 Tm 6 To 7 B 1 3 5 C 1 4 7 D A 1 2 3 E B 1 2 9 F 1 5 9 G C 2 2. 8 H E, F 4 4 10 D 2. 5 8 H, G 2 2 8 Construct the project network using PERT and find the critical path, expected project completion time and variance for each activity. What is the probability of completing the project on or before 23 weeks