(1 point) Use Green's Theorem to evaluate $\int_C \mathbf{F} \cdot d\mathbf{r}$.
where
$\mathbf{F}(x, y) = \left(\sqrt{x^2 + 1}, 3 \tan^{-1}(x)\right)$
and
C is the triangle from (0, 0) to (4, 4) to (0, 4) to (0, 0).
Hint: Check the orientation of the curve before applying the theorem
