Leasing a car for a short time is usually cheaper than buying the same car since a.) insurance premiums are lower for leased cars b.) leasing generally comes with a lower interest rate c.) people who lease cars are considered more responsible than those who buy d.) in leasing a car you pay only for the depreciation of the car rather than the total value

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?