An air-filled parallel-plate capacitor \(A\) has plate area \(A_0\) and plate separation \(d_0\). It is charged until it holds a net charge \(Q_0\) and is then disconnected from the charging source. Capacitor \(A\) is subsequently connected in parallel across an initially uncharged, air-filled parallel-plate capacitor \(B\), which has plate area \(2A_0\) and plate separation \(d_0/2\). After electrostatic equilibrium is reached, what is the final charge on capacitor \(B\)?