I'm working on a problem involving the Divergence Theorem and need help understanding both the theorem itself and how to apply it. Could someone explain the theorem in simple terms, including when and why it's used? Also, please provide a step-by-step solution to this problem:Using the Divergence Theorem evaluate r n d over the whole surface of the cylinder bounded by x^2+y^2=1, z=0 and z=3 r=xi+yj+zkIt would be great if you could highlight any key concepts or common mistakes to avoid. Thanks!