Answer
a=b>c>d=e
Work Step by Step
The electric potential increases linearly as you move from the negative to the positive plate. Points a and b are the same distance away from the negative plate. They are also the furthest away from the negative plate, so they have the highest electric potential. Point c is at an intermediate distance, therefore it has the next highest electric potential. That leaves point d and e, which are closest to the negative plate with the lowest electric potential.
