Assuming That $S$ Satisfies the Conditions of the Divergence Theorem and the Scalar

Short Answer

Assuming that $S$ satisfies the conditions of the Divergence Theorem and the scalar functions and components of the vector fields have continuous second order partial derivatives, find
$$\iint _ { s } 3 \mathbf { a } \cdot \mathbf { n } d S \text {, }$$
where a is the constant vector.