Electric and potential fields...(solid conducting core)

Consider a concentric spherical system
made up of the following parts: A solid conducting core radius a with total charge Qc , surrounded by a conducting shell of inner radius b and outer radius c. The shell has total charge -Qc .

For each of the appropriate regions, find
Qenclosed , E and V. Make the appropriate set of graphs for charge density, charge enclosed, electric field, and potential
as a function of radius. Use infinity as the potential reference point (V(inf)=0). Be sure to note the direction associated with vector quantities.