A new bridge construction project will take seven years to complete. The construction will require $10 million in labor costs per year and $23 million in construction materials each year. The project will lengthen the transport time for 50,000 workers by 15 hours per year for the duration of the construction. Workers are paid $8 per hour, which reflects a worker's per hour valuation of leisure. Once finished, the bridge will ease transportation within the city. Each of the 50,000 workers will have their transportation time reduced by 40 hours per year. The project also involves converting the area around the new bridge into a large park. Only workers will use the park and each worker values the park at $20 per year. Assume that the discount is 5% and that workers live forever. The benefits of the bridge begin in year 7 and the project begins in year 0 (that is, the construction runs from year 0 to year 6). (Hint: the present value of a benefit B that starts in year 1 and lasts forever is # , where r is the discount rate; and the net present value of a benefit B that starts in year t