Problem 9. (1 point) (a) Calculate the flux of the vector field F(x, y, 2) = 91 - 4k through a sphere of radius 2 centered at the origin, oriented outward. Flux = (b) Calculate the flux of the vector field F(x, y, z) = i - 4j + 7k through a cube of side length 2 with sides parallel to the axes, oriented outward. Flux = Note: You can earn partial credit on this