Imagine that you have a hollow spherical conductor carrying a net charge \(\displaystyle +Q\) that has inner radius \(\displaystyle R_1\) and outer radius \(\displaystyle R_2\). Now imagine again that you threw a point charge, \(\displaystyle +Q/2\), at the center of the sphere. Find the potential as a function of \(\displaystyle r\), the distance from the center, for \(\displaystyle 0