End-of-Lecture Assignment: Chapter 3 Part D Consider the following project. Activity a E b Immediate Predecessors A 1 3 Nm B N 4 A 4 6 D B 8 10 u unun E C D 2 8 F D 4 6 G E 1 N 3 a) Draw the activity-on-node network. b) Compute the expected time and variance of each activity. c) Find the critical path. d) Find the critical activities. e) Compute the expected duration of the project. f) Compute the variance of the duration of the project. g) Compute the standard deviation of the duration of the project. h) Compute the probability of finishing the project within 18 weeks. i) Compute the probability of finishing the project within 21 weeks