critical path and the overall project completion time

The following table lists seven different activities that need to be performed to complete the

project. Also listed are the immediate predecessors for each activity and the optimistic, most

likely, and pessimistic time estimates for each activity

Activity: A, B, C, D, E, F, G

Predecessor: none, none, A, A, C, D, B,

Optimistic: 3, 2, 5, 6, 3, 1, 8

Most likely: 5, 3, 7, 6, 4, 8, 9

Pessimistic: 7, 4, 15, 6, 5, 9, 10

Sketch and analyze the network associated with this problem. That is, determine the earliest and

the latest start and finish and the slack for each activity. Also determine the critical path and the

overall project completion time.