A project involving the installation of a new production facility consists of totally 15 activities. The immediate predecessors and activity time (in weeks) are shown below. Complete the network diagram and find: The total project completion time = ? (4 point) Which Activity is on the Critical Path ? (4 points) The slack time for activity O = ? (4 points) If activity D duration is added by 3 more weeks (i.e., activity time = te(D)+3), project completion time = ? (4 points) Note: This is a MULTIPLE-ANSWER problem, you have to select one correct answer for each of the above 4 questions. Activity Predecessor te = ? slack -- volvo A B D -- : A A B, C, E G F, H F, H D, I K G, J, L G F G H 1 J K L M N Time duration (in weeks) to tm to 3 4 5 3 4 5 3 5 7 1 2 3 1 3 5 2 3 4 2 3 4 3 5 7 1 3 5 1 3 11 3 5 13 2 4 6 4 5 6 2 3 4 14 15 16 02Sre G D A E B = The Total Project Completion Time = 24 weeks The Total Project Completion Time = 28 weeks The Total Project Completion Time = 29 weeks The Total Project Completion Time = 31 weeks Activity B is on the Critical Path Activity F is on the Critical Path Activity L is on the Critical Path Activity O is on the Critical Path The slack time for activity O = 0 week The slack time for activity O = 1 week The slack time for activity O = 6 weeks The slack time for activity 0 = 8 weeks If activity D is added by 3 more weeks, project completion time will be 27 weeks If activity D is added by 3 more weeks, project completion time will be 29 weeks Olf activity D is added by 3 more weeks, project completion time will be 31 weeks If activity D is added by 3 more weeks, project completion time will be 33 weeks