an improvement project requiring an initial investment of $30,000 has been proposed. the annual revenue estimates and associated probabilities are as follows: -$15,000 (0.4), $15,000 (0.5), $20,000 (0.1). the estimated life of the project is 10 years. determine whether the project is a good investment if the marr is 10% using: a) the optimistic, most likely and pessimistic approach; b) the exact probabilities.