A project has four activities (A, B, C, and D) that must be performed sequentially. The probability distributions for the time required to complete each of the activities are as follows:

a. Construct a spreadsheet simulation model to estimate the average length of the project and the standard deviation of the project length.
b. What is the estimated probability that the project will be completed in 35 weeks or less?

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Activity Time Activity (weeks) Probability 0.25 A 0.35 0.25 0.15 B 3 0.20 0.55 0.25 0.10 10 12 0.25 14 0.40 16 0.20 0.05 18 D 0.60 10 0.40