In Figure how much charge is stored on the parallel plate capacitors by the 12.0V battery? One

Question:

In Figure how much charge is stored on the parallel plate capacitors by the 12.0V battery? One is filled with air, and the other is filled with a dielectric for which K = 3.00; both capacitors have a plate area of 5.00 x 10-3 m2 and a plate separation of 2.00mm.