Two parallel-plate capacitors have the same dimensions, but the space between the plates is filled with air in capacitor 1 and with plastic in capacitor 2 . The potential difference between the plates is the same in both capacitors. Compare (a) the magnitudes of the electric fields \(E_{1}\) and \(E_{2}\) between the plates, \((b)\) the magnitudes of the charges on the plates \(q_{1}\) and \(q_{2}\), and \((c)\) the energies stored in the capacitors.