A circuit consists of an ideal battery of emf \(\varepsilon\), an open switch \(S\), three resistors with resistances \(R\), \(2R\), and \(R\), and an initially uncharged capacitor of capacitance \(C\), connected as shown in the diagram. At time \(t = 0\), switch \(S\) is closed. In terms of \(\varepsilon\) and \(R\), what are the currents through the battery immediately after switch \(S\) is closed and a long time after switch \(S\) is closed?