A simple CPM network has three activities, A, B, and C. A is an immediate predecessor of B and of C. B is an immediate predecessor of C. The activity durations are A=4, B=3, C=8.

a.

The critical path is A-C, duration 12.

b.

The critical path cannot be determined without knowing PERT expected activity times.

c.

The critical path is A-B-C, duration 15

d.

The network has no critical path

e.

The critical path is A-B-C, duration 13.5