where C is the positively oriented rectangle having vertices (0,0), (2,0),
(2,4), and (0,4).
2. Compute the curl of the vector field F(x,y,z) = x2i
- yzj + (x+y+z)k.
3. Compute the divergence of the vector field F(x,y,z) = x2i - yzj + (x+y+z)k.