Capacitor

If half of the space between the plates of a parallel plate capacitor is filled with a medium of dielectric constant 4 , the capacitance is C1. If one third of the space between the plates of the capacitor is filled with the medium of dielectric constant 4 , the capacitance is C2. If in both cases, the dielectric is placed parallel to the plates of the capacitor, then C1:C2=