1. Compute
for the vector field F(x,y)=(x2y - 1)i - (y2)j
where C is the rectangular path beginning at (0,0), proceeding to (3,0),
then (3,2), then (0,2), and finally back to (0,0).
2. If F(x,y,z) = xyz i - x2y k, compute
curl F.
3. If F(x,y,z) = xyz i - x2y k, compute div F.