A current of \(6\) A enters at the corner \(P\) of an equilateral triangle \(PQR,\) with each side having a wire of resistance \(2~\Omega.\) The current exits at corner \(R.\) The currents \(i_1 \) in ampere is:
1. \(2\)
2. \(3\)
3. \(6\)
4. \(9\)