Electrostatics: JEE Main 2025 Physics question

A capacitor, $C_1 = 6\ \mu$F is charged to a potential difference of $V_0 = 5$ V using a 5V battery. The battery is removed and another capacitor, $C_2 = 12\ \mu$F is inserted in place of the battery. When the switch 'S' is closed, the charge flows between the capacitors for some time until equilibrium condition is reached. What are the charges ($q_1$ and $q_2$) on the capacitors $C_1$ and $C_2$ when equilibrium condition is reached.