please help eitu problem 3

PERT/CPM Sample Problem 3 Name: A construction project is broken down into the following nine tasks: 1. Complete the chart below (Round numbers to the second decimal place). Immed Times (Week) Task Expected Time Pred. Tm A None 2 3 4 B 8 11 20 A 2 3 4 Task Variance A N-NOO D A 1 3 5 E 4 12 F 1 3 2 8 G DE B, E, F G 1 9 H 3 4 17 Nw 1 H 2 4 12 2. Construct a network diagram and determine ES/EF and LS/LF. 3. Determine the critical path(s). 4. What is the expected completion time of this project? 5. Identify all tasks with slack time. 6. What is the probability that the project team will fail to complete the project in 36 weeks