Electric potential problem?

A thin flat nonconducting disk, with radius R0 and charge Q, has a hole with a radius R0/2 in its center. Find the electric potential V(x) at points along the symmetry (x) axis of the disk (a line perpendicular to the disk, passing through its center). Let V=0 at x=∞. Give your answer in terms of Q, x, R0, ϵ0 and... show more A thin flat nonconducting disk, with radius R0 and charge Q, has a hole with a radius R0/2 in its center.
Find the electric potential V(x) at points along the symmetry (x) axis of the disk (a line perpendicular to the disk, passing through its center). Let V=0 at x=∞. Give your answer in terms of Q, x, R0, ϵ0 and appropriate constants.
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