Enter the value of n so the expression (-y + 5.3) + (7.2y - 9) is equivalent to 6.2y + n.

Use stokes' theorem to evaluate c f · dr where c is oriented counterclockwise as viewed from above. f(x, y, z) = xyi + 5zj + 7yk, c is the curve of intersection of the plane x + z = 8 and the cylinder x2 + y2 = 81.