Problem 3.21 Question Help Coleman Rich Control Devices, Inc., produces custom-bull relay devices for automakers. The most recent project undertaken by Rich requires 14 different activities. Rich's managers would like to determine the total project completion time (in days) and those activities that le along the critical path. The appropriate data are shown in the following table Immediate Predecessor(s) EF G H Activity A B C D E F G Time (days) a m b 5 5 7 1 2 4 $ 5 5 4 8 13 2 9 17 2 5 8 2 6 8 Immediate Predecessor(s) Activity H 1 J K D M 0 N Time (days) a b 4 4 7 2 6 9 1 5 9 8 9 13 3 5 6 1 2 3 6 7 12 J K LM a) The expected completion time of the project days (round your response to two decam paced) a) The expected completion time of the project days (round your response to two decimal places) The activities that represent the project's critical path are b) It the time to complete the activities on the critical path is normally distributed, then the probability that the critical path will be finished in 55 days or less - (round your response to two decimal places) c) Using the standard normaltable, the number of days that would result in 99% probability of completion days (round your response to two decimal places)