3. Use Stokes theorem to evaluate fa. In each case C is oriented counterclockwise when viewed from above. a) a = (x+ y) da + (y+2) dy + (z + a2) dz, C is the triangle with vertices (1,0,0), (0, 1,0), and (0,0, 1). (Compare to section 16.8, problem 7.) %3D

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