Use Stokes' Theorem (and only Stokes' Theorem) to evaluate F . dr, where Jo F(x, y, z) = (3y, -2x, 3y) and C is the curve given by a ty' = 9, z = 2. (So to be clear, if you want to evaluate this and use Stokes' Theorem then you must be calculating the surface integral of the curl of F of a certain surface S.)