You may need to use the appropriate technology to answer this question. Blue Lagoon is a contractor that installs residential swimming pools, projects that consist of nine major activities. The activities, their immediate predecessors, and the activity time estimates (in days) are shown. Activity Immediate Predecessor Optimistic Most Probable Pessimistic A 3 5 6 B 2 4 6 C A, B 6 7 8 D A, B 8 10 11 E B 2 4 6 F C 1 2 3 G D 4 8 10 H D, F 7 9 11 I E, G, H 3 4 5