The fuel tanks for airplanes are in the wings, cross section below. The tank must hold 6000 lb of fuel with density 42 lb/fts. Estimate the length of the tank using Simpson's Rule. Horizontal spacing = 1.6 ft yo = 1.3 ft, y, = 1.6 ft, y2 = 1.7 ft, y3 = 1.9 ft, y4 = 2.2 ft, y5 = 2.3 ft, yo = 2.1 ft . . . The length of the tank is o ft. (Round to the nearest tenth as needed.)