A spherical conductor, of radius a, carries a charge Q. It is surrounded by linear dielectric material of susceptibility xe, out of radius b. Find the energy of this configuration and compare it with case without the dielectrics. (a) Calculate electric displacement (D) in the air part, the dielectric part and the conductor using Gauss's law in the presence of Dielectrics. (b) Calculate the electric field (E). (c) Calculate the total energy and compare it with case without the dielectric (increase or decrease)