Please explain thoroughly.

l. A student wants to use CPM to analyze the schedule: Immediate Activity Predecessor Duration (day) a - 3 b a 4 c a 5 d - 3 e d 6 f M 7 a) Show all potential paths and their durations. b) What is the critical path? c} How long is the project duration? d) If activity "a" does not start until the second day (delayed by one day), what is your new estimate on total project duration? e) If activity "e" does not finish until clay 10 (delayed by one day), what is your new estimate on total project duration