48 Lamont Henri needs to plan and manage a local construction project. The following table describes the relationships between the activities that need to be completed:

ACTIVITY DAYS IMMEDIATE a m b PREDECESSORS A 4 8 13 —

B 4 10 15 A C 7 14 20 B D 9 16 19 B E 6 9 11 B F 2 4 5 D, E G 4 7 11 C, F H 3 5 9 G I 2 3 4 G, H If using Crystal Ball , assume that the actual duration of each activity follows a BetaPert distribution, with the three time estimates shown for that activity. Otherwise, assume that each activity time is normally distributed with expected time and standard deviation . Round off all activity times to one decimal place. Use simulation to determine the probability that the project will take at least 50 days.