The widths (in meters) of a kidney-shaped swimming pool were measured at 6-meter intervals as indicated in the figure. Use the Midpoint Rule with n = 4 to estimate the area S of the pool if a₁ = 6.2, a2 = 7.2, a3 = 6.8, a4 = 5.6, a5 = 5, a6 = 4.8, and a7 = 4.8. m² a₁ a, a a a. a a,

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