A network consists of the following list. Times are given in weeks. Duration Preceding Activity A 9. -- A C A 12 D A E 6. F 8 G , F 3 H D I H 8. G, I , J J 6. K 2 a) Draw the network diagram. Find ES, EF, LS, LF, and the slack times for each of the activities. b) Which activities are critical? Determine the critical path(s). c) What is the duration of the critical path(s)?