Solve the all parts of given question:
Question: An insulating sphere of radius R has a total charge q and a charge density that is proportional to the square of the radial distance from its center.
Part A: Use gauss' law to find the electric field everywhere?
Part B: Determine the electric potential at the center of the sphere?
Part C: Make a graph for e vs. r and v vs. r, where e =electric field and v=electric potential?
I need help to determine the electric potential at the center of the sphere.