A parallel plate capacitor of capacitance c0 has plates of area a with separation d between them. When it is connected to a battery of voltage v0, it initially has charge of magnitude q0 on its plates. While remaining connected to the battery, the space between the plates is then filled with a material of dielectric constant 3. After the dielectric is added, the magnitude of the charge on the plates and the magnitude of the potential difference between the plates are?.