6-43 Two possible routes for a power line are under study. Data on the routes are as follows: Length First cost Maintenance Around Under the Lake the Lake 15 km 5 km $5000/km $25,000/km $200/km/yr $400/km/yr Useful life, in years 15 15 Salvage value $3000/km $5000/km Yearly power loss $500/km $500/km Annual property taxes 2% of first cost 2% of first cost If 7% interest is used, should the power line be routed around the lake or under the lake? Around the lake.) (Answer: