A human-powered aircraft has a gross weight of \(240 \mathrm{lbf}\) including the pilot. Its wing has a lift coefficient of 1.5 and a liftto-drag ratio of 70. Estimate the wing area needed and the pilot power that must be provided for this craft to cruise at \(15 \mathrm{mph}\). Assume that the wing profile drag is about 40 percent of the total drag and the propeller efficiency is 80 percent.