A cross-section of an airplane wing is shown. Measurements of the thickness of the wing, in centimeters, at -centimeter intervals are 5.7, 20.7, 26.2, 29, 27.3, 27.3, 24.2, 20.5, 15.9, 8.9, and 3.1. Use the Midpoint Rule with n=5to estimate the area of the wing's cross-section if a=160a=160. (Assume the thickness of the edges is nonzero.)