1. A CPM network diagram is drawn using AOA (activity on arrow) format to analyze the schedule: Immediate Activity Pred. a b a 2 Duration (day) 3 4 5 3 6 7 ha d b,c,e ON I a) Show all potential paths and their durations b) Calculate ES, EF, LS, LF and Slack for all activities. c) How long is the project duration? d) If activity is delayed by 2 days, what is your new estimate on total project duration? e) If all activities are on schedule and then activity e' is delayed by one day, what is your new estimate on total project duration