Assuming that bus travel is an inferior good, an increase in consumer income, other things being equal, will cause a. an upward movement along the demand curve for bus travel. b. a downward movement along the demand curve for bus travel. c. a rightward shift in the demand curve for bus travel. d. a leftward shift in the demand curve for bus travel.

Anew 2-lane road is needed in a part of town that is growing. at some point the road will need 4 lanes to handle the anticipated traffic. if the city's optimistic estimate of growth is used, the expansion will be needed in 4 years and has a probability of happening of 40%. for the most likely and pessimistic estimates, the expansion will be needed in 8 and 15 years respectively. the probability of the pessimistic estimate happening is 20%. the expansion will cost $ 4.2 million and the interest rate is 8%. what is the expected pw the expansion will cost?