For the circuit illustrated, a current of $3.0\,\text{A}$ flows through the $2.0\,\Omega$ resistor. Determine the current $I$ supplied by the power supply and the voltage $V$ across it.
- A$I = 3.0\,\text{A},\; V = 10.5\,\text{V}$
- B$I = 4.0\,\text{A},\; V = 9.0\,\text{V}$
- C$I = 4.0\,\text{A},\; V = 12\,\text{V}$
- D$I = 12\,\text{A},\; V = 18\,\text{V}$