To build Indiana University’s new law building, the activities in the file P15_32.xlsx must be completed (all times are in months). Assume that all activity times are normally distributed with the...

To build Indiana University’s new law building, the activities in the file P15_32.xlsx must be completed (all times are in months). Assume that all activity times are normally distributed with the means and standard deviations given in the file.

a. Estimate the probability that the project will take less than 30 months to complete.

b. Estimate the probability that the project will take more than three years to complete.

c. For each of the activities A, B, C, and G, estimate the probability that it is a critical activity.