Question: simple CPM network has five activities, A , B , C , D , and E . A is an immediate predecessor of B and

simple CPM network has five activities, A, B, C, D, and E. A is an immediate predecessor of B and of C. B and C is immediate prodecessor of D. D is immediate predecessors of E Which of the following statements is TRUE?"
There are four paths in this network
There are five paths in this network.
The critical path is A-B-D-E
The duration of critical path is 21
The duration of critical path is 17

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