Suppose that a small ultralight is powered by a gasoline engine. The cruising speed for the ultralight is 33 mph. a. Assume that it requires 25 hp of thrust to power the ultralight at 33 mph and calculate the drag force on the ultralight at 33 mph. Express your answer in pounds. b. Calculate the energy required for the ultralight to travel for 2 hours (66 miles) at 33 mph. Express your answer in BTU. c. The gasoline has an energy density of 121,000 BTU per