** In a series circuit, the total resistance is the sum of individual resistances.* **Calculation:** R<sub>total</sub> = R<sub>1</sub> + R<sub>2</sub> + R<sub>3</sub> = 100Ω + 149Ω + 170Ω = 419Ω* **Answer:** R<sub>total</sub> = 419Ω**Step 2: Calculate Total Current*** **