Electric circuit

The above diagram is a circuit that consists of a power supply of voltage \(V\) and two capacitors A and B with capacitances \(C\) and \(2C\), respectively. Suppose that the switch \(S_1\) is closed and the switch \(S_2\) is open, and sufficient time passes until the quantity of the electric charge on the capacitor A becomes \(Q.\) In this state, we open the switch \(S_1\) and close the switch \(S_2\) and let sufficient time pass. Then what will be the ratio of the quantities of the electric charges on the capacitors A and B, i.e. \(Q_A:Q_B?\)

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