1- Compute the circulation of ~ F = y~ i + z~ k around a closed curve C, where C is the intersection of the plane x + 2y + z = 4 with the cylinder x2 + y2 = 1 with orientation induced by the upward unit normal to the plane
2- Compute the circulation of ~ F = y~ i−x~ j around C where C is the ellipse x2 + 9y2 = 9 oriented counter-clockwise