A. An insulating sphere with radius a has a uniform charge density rho. The sphere isnot centered at the origin but at . Show that the electric field inside the sphere is given by E= rho(r-b)3/εo. b. An insulating sphere of radius R has a spherical holeof radius a located within its volume and centered adistance b from the center of the sphere. The solid partof the sphere has a uniform volume charge density rho. Find the magnitude and direction of the electric field E inside the hole, and show that is uniform over the entire hole.