Using PERT, Adam Munson was able to determine that the expected project completion time for the construction of a pleasure yacht is 24 months, and the project variance is 4. a) The probability that the project will be completed in 20 months = (round your response to four decimal places). 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: Time (days) a m b Time (days) m Immediate Predecessor(s) a b Activity A B 4 5 5 5 6 E, F 1 7 1 6 2 6 Immediate Predecessor(s) Activity H I A J A K B, C L D M G H 1 1 4 6 7 10 1 9 10 1 9 7 11 7 5 12 11 19 6 Z 3c. 1 E F G 6 J 2 5 1 3 K 2 6 7 8 LAM a) The expected completion time of the project = days (round your response to two decimal places). Kelle Carpet and Trim installs carpet in commercial offices. Peter Kelle has been very concerned with the amount of time it took to complete several recent jobs. Some of his workers are very unreliable. A list of activities and their optimistic completion time, the most likely completion time, and the pessimistic completion time (all in days) for a new contract are given in the following table: Time (days) b Immediate Predecessor(s) Activity a m 3 6 8 4 4 2 7 ac - IT MUOU> 2 6 4 10 B, D A, E A, E F 1 2 3 6 11 G 10 14 2 9 12 20 10 16 8 HI This exercise contains only part a. a) Based on the activity time estimates, the expected times and variance for each of the activities are: (Round your responses to two decimal places.) Activity Expected Time Variance A