A cross-section of an airplane wing is shown. Measurements of the thickness of the wing, in centimeters, at 21-centimeter intervals are 6.3, 19.9, 27.2, 29.0, 27.5, 27.4, 24.1, 20.1, 16.0, 8.2, and 3.3. Use the Midpoint Rule with n = 5 to estimate the area of the wing's cross-section if a = 210. (Assume the thickness of the edges is nonzero.)
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