A car battery is connected to a parallel-plate capacitor made of two 10 cm × 10 cm electrodes, with a separation distance of 2.0 mm. The dielectric material between the plates has a breakdown electric field strength of 2.5 × 10⁶ N/C. Determine the number of electrons that must be transferred from one electrode to the other to create a spark in the dielectric material if the dielectric constant is 2.2.