FEDS: Spherical Resistors [27 points]. Consider a hollow conducting sphere composed of two concentric hollow spheres (basically two adjacent thick shells), as in gure. The inner and outer radii of the innermost shell are a and b and the resistivity of this shell is p1. The inner and outer radii of the outermost shell are b and c and the resistivity of this shell is {12. There is vacuum elsewhere (including inside the inner shell, i.e., for r