In the circuit shown in the figure, a $3\ \mu\text{F}$ capacitor is connected in series with a parallel pair of capacitors, $2\ \mu\text{F}$ and $4\ \mu\text{F}$, across an ideal battery of $12\ \text{V}$. All the capacitors were uncharged before they were connected. Once the charges stop moving, the charge on the $4\ \mu\text{F}$ capacitor is

Fig. 1: A 12 V battery in series with a 3 microfarad capacitor and a parallel pair of 2 microfarad and 4 microfarad capacitors.