a. Suppose the spherical shell is made of material with a constant conductivity = 3.3 x 104 (22.m). Find the value of the resistance. R = abc a sin(x) x10 Submit Reset All Reset Divide the resistor up into thin spherical shells of thickness dr. What is the resistance of the shell of radius ? The total resistance is the integral of the resistances of the infinitesimal shells. b. Suppose the spherical shell is made of a material with a nonuniform conductivity given by = alr, where a is a constant. If the total resistance of the sphere is R = 2.6 10-4 Q2, find the value of a.