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(1 point) In this problem we use the change of variables x = 2u + v, y = u - 3v to compute the integral Sp(a + y) dA, where R is the parallelogram formed by (0, 0), (4, 2), (6, -4), and (2, -6). First find the magnitude of the Jacobian, | J(u, v) | - Then, with a = b = C = , and d = SR(x + y) dA = Sa Sa ut vt ) du du = Hint: To find the bounds of integration, find a square in the wv plane that gets mapped to R