A parallel-plate capacitor, with air between the plates, is connected to a battery. The battery establishes a potential difference between the plates by placing charge of magnitude q=8.77 × 10-6 C on each plate. The space between the plates is then filled with a dielectric material, with dielectric constant k = 6.55. What must the magnitude of the charge in micro coulombs on each capacitor plate now be, to produce the same potential difference between the plates as before?