3. Two parallel circular rings of radius R have their centers on the x-axis separated by a distance f. as shown in the figure. If each ring carries a uniformly distributed positive charge Q, find the electric field, E(x), at points R NIS R along the x-axis. What will be the force on a positive X charge q placed at the origin O? Show that the charge q will undergo simple harmonic motion if it is slightly displaced from the origin and then released. What will be the period of the motion if the mass of the charge is m? What happens if the charge is negative