To solve the series-parallel circuit with a 40V power supply, the total resistance was calculated as approximately 16.265 ohms, leading to a total current of about 2.459 amps. The next step involves determining the voltage across the 11-ohm resistor, which will help find the voltage drops across the circuit's three legs. This information is crucial for calculating the current through the 12-ohm and 14-ohm resistors, ultimately leading to the determination of V3. Additionally, understanding Kirchhoff's Laws is essential for effectively analyzing the circuit. Clear step-by-step calculations are necessary for accurate results.