Use Stokes' Theorem to compute the counterclockwise circulation of the vector field $\mathbf{F} = \langle 4y, 1z, 4x \rangle$ along the curve $C$, where $C$ is the rectangle with vertices $(0, 0, 3)$, $(2, 0, 3)$, $(2, 5, 3)$, and $(0, 5, 3)$.
To apply Stokes' Theorem, you must first find the curl of the vector field.
$\text{curl}(\mathbf{F}) = \square$
Now, use the curl to compute the circulation.
$\text{Circulation} = \oint_C \mathbf{F} \cdot d\mathbf{r} = \square$