In the circuit diagram, the resistor $S$ is connected so that it is neither in series with nor in parallel to the other resistors. Using Kirchhoff’s laws together with the information given in the diagram, it is possible to work out the resistance of each of the two identical resistors marked $R$. What is the resistance of each resistor $R$?
- A$3.0\,\Omega$
- B$4.0\,\Omega$
- C$4.8\,\Omega$
- D$5.0\,\Omega$