3. A precedence diagram network is shown below. The optimistic, most likely, and pessimistic durations are shown for each activity (To, Tm, Tp). What is the probability (in percent) of completing the project in 70 days? B D F 15, 20, 25 9, 13, 20 20, 26, 33 A H 2, 4, 6 5,6,7 E G 15, 18, 28 19, 22, 26 10, 17, 26