1. The problem statement, all variables and given/known data I have to use stokes' theorem and calculate the surface integral, where the function F = <xy,2yz,3zx> and the surface is the cube bounded by the points (2,0,0), (0,2,0),(0,0,2),(0,2,2),(2,0,2),(2,2,0),(2,2,2). The back side of the cube is open. [/B] 2. Relevant equations 3. The attempt at a solution I found the curlF = <-2y,-3z,-x>. I know next I have to find a unit normal vector. But exactly which side of the cube am I supposed to find the normal vector to? Or would I HAVE to take the line integrals for the bottom side of the cube?