Precedence Diagram (AON - Acitivty On Node) 1 Activity A 3 Activity + 6 Activity F 9 Activity 1 4 Activity D 7 Activity G 10 Activity J 12 Activity L 14 Activity N start 2 Activity B 5 Activity E 8 Activity H 11 Activity K 13 Activity M Legend: ES Activity # EF Activity description F ES: early start EF: early finish LS: late start LF. late finish D: duration F: float (or slack) E LS D LF The next page shows the Activity on the Node network diagram for the project having the following set of activities: Activity Number Description Duration Predecessors 1 Activity A 6 2. Activity B 2 3 Activity C 3 A 4 Activity D 2 B 5 Activity E 4 B 6 Activity F 1 7 Activity G 3 C.D 8 Activity H 6 DE 9 Activity I 3 F G 10 Activity ) 3 G H 11 Activity K 1 H 12 Activity L 2 IJ 13 Activity M 3 K 14 Activity N 4 L.M Note that a dummy node START, with duration 0, is introduced to allow for a common start of activities A and B. Find ES, EF, LS, LF and F for all the activities in the diagram and answer the following questions: 2-1. What is EF of activity G? 2-2. What is ES of activity H? 2-3. What is the total project duration? 2-4. What is LF of activity J? 2-5. What is LS of activity D? 2-6. What is Float of activity J? 2-7. What is Float of activity F? 2-8. What is ES of activity N? 2-9. How many critical activities are there? 2-10. How many critical paths are there? (5 (2 (17 (12 (5 ( ( (15 (6 ( 7 4 19 13 4 1 1 17 7 1 9 6 21 14 3 2 2 19 9 2 11 8 31 15 2 3 3 25 10 3 13 10 43 30 1 4 4 36 12 4 other) other) other) other) other) other) other) other) other) other)