Assume that the pessimistic and optimistic estimates in Problem 10-6 have 40% and 20% probabilities, respectively.
(a) What is the expected PW the expansion costs?
(b ) What is the expected number of years until the expansion?
(c ) What is PW of the expansion cost using the expected number of years until the expansion?
(d ) Do your answers to (a) and (c) match? If not, why not?