(Solved): Which of the figures below show equipotential surfaces for this charge (a point charge in 2-D or li ...

Which of the figures below show equipotential surfaces for this charge (a point charge in 2-D or line charge in 3-D) where the potential differences (voltage) between adjacent surfaces take on the same value, e.g., if the smallest equipotential surface has a potential of $10\mathrm{V}$ and the equipotential surface that is just larger than this first surface has a potential of $8\mathrm{V}$, then the next largest equipotential surface would have a potential of $6\mathrm{V}$ ?