Problem 3.21 Question Help Coleman Rich Control Devices, Inc., produces custom-built relay devices for auto makers. 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 lie along the critical path. The appropriate data are shown in the following table: Immediate Predecessor(s) EF GH Time (days) Activity a m b 5 7 9 B 1 3 4 7 7 7 D 6 8 12 E 3 10 17 F 1 4 7 G 36 8 Immediate Predecessor(s) Activity H 1 A j K B.C L D M D N Time (days) a m b 4 4 7 3 6 8 2 5 9 8 9 13 1 6 6 1 2 3 5 8 12 1 ! J K LM a) The expected completion time of the project = 54,00 days (round your response to two decimal places) The activities that represent the project's critical path are A.C.E.M.I.K.MN b) if the time to complete the activities on the critical path is normally distributed, then the probability that the critical path will be finished in 5 days or less - round your response to two decimal places) Enter your answer in the answer box and then click Check Answer 1 remaining part Clear A Check Anawr