2.2) The A-O-N network dingram and time estimates (in days) of each activities for the custom order project of the Air Control Company is presented below. D 0 A Start 0 End D E C Activities Optimistic Time Most likely Time Pessimistic Time m b 15 18 27 B 5 11 23 C 16 28 46 D 12 15 18 E 1 4 13 4 7 a) Calculate the expected time of each activity? (5 points) b) Calculate the variance of the time for each activity? (5 points) e) Find the critical path. What are the activities on the critical path? (5 points) d) What is the expected completion time of the Project and what is the standard deviation of critical path? (5 points) c) What is the probability that the project will finish before 48 days? (5 points) f) What is the probability that the project will finish before 52 days? (5 points) FORMULAE 12 value = 6 1, , = (-9). ., , = . T-TE Probability 0.22 0.59 0.32 0.63 0.62 0.72 0.97 0.83 112 0.87 127 0.90 Z=