Use the Green's Theorem area formula, Area of R = 1/ 4x dy dy-y dx, to find the area of the region, R, enclosed by the astroid, 2 C r(t) = (-5 cos ³t)i + (-5 sin ³t) j such that 0 st≤ 2. The area of Ris (Type an exact answer, using as needed.) 18-

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