A crosssection of an airplane wing is shown. Measurements of the thickness of the wing, in centimeters, at 16-centimeter intervals are 5.7, 20.7, 26.9, 29.0, 28.1, 27.7, 24.1, 20.1, 15.3, 9.1, and 2.3. Use the Midpoint Rule with n = S to estimate the area of the wing's cross-section if a = 160. (Assume the thickness of the edges is nonzero.)