How would i set up the integral to find the flux (FndS) (n is the normal vector) where my F is given by F(x,y,z) = (2x, -y, 3z) and surface S given by the cone z=f(x,y)=sqrt (x^2+y^2) constrained by z=1 and z=3 (these are just bounds not surfaces(not a closed surface)). It is oriented towards the positive z direction.