10. A thin circular loop of radius b and linear charge density 2 lies in the xy plane with its center at the origin (9). A second loop of radius a and linear density -2 is parallel to the xy plane with its center at the position (x = 0, y = 0, z = D). b D a Z 9 (6 pts) (a.) Find an expression for the scalar potential, V(z), on the z axis. (6 pts) (b.) Find an expression for the scalar potential difference between the centers of each of the loops