Evaluate the following integral over a closed continuous surface when 8kk-k, 8 = 181, Uk is a free point, and ak is a fixed point where (a) (5 points) a lies outside the volume of integration (b) (5 points) is inside the volume of integration (c) (5 points) is on the surface of the volume of integration 145 = OD aD 8i8j8kk dA 85 (1)