Please assist me in this physics problem with correct steps and answer. PHY 131: electric potential

5. You measure the electric potential in some region of space, recording it as a function of position in cartesian coordinates. You find that it depends only on one axis; you make that your z axis, so it doesn't depend on a or y. You find that the potential is a maximum at one value of z, so you make that value z = 0 and you set the potential here equal to zero. The potential then has the form: V(2) =-Bz2 At a distance of z = +Z from z = 0, you find that the value of potential begins to drop of linearly, with the form V(2) =-2BZ (121 -2 Find the electric field where -Z Z. Describe the charge distribution that would produce this electric field. The more complete your description, the more points you will recieve. C