a) if the charge is not uniformly distributed on the disk, it depends on the radius r, i.e. ρ=ρ(r). Write the general solution of the electric potential due to the charge distribution? (b. If the charge distribution also depends on the azimuthal angle φ, i.e. ρ=ρ(r,φ), write the general solution of the electric potential due to the charge distribution?