Answer:
The solution to (a) part of the is shown on the first uploaded image
b) Looking at the solution in part a we can see that the separation between the equipotential surfaces is not equal.
c)Generally the equipotential surface are perpendicular to the direction of the electric field.The electric field due to the point positive charge points radially outwards. The radius of a circle is always perpendicular to the radius drawn to a point on the circumference. Therefore, the equipotential surfaces of a point charge are concentric circles around the charge
Explanation:
The step solution to this problem is shown on the second uploaded image