6. The polarity on the side of the resistor where current enters is ______. The polarity on the side of the resistor where current exits is ___________.
9. If a 3.9 kΩ, a 7.5 kΩ, and a 5.6 kΩ resistor are connected in series with a 34 V source, the voltage dropped across the 7.5 kΩ resistor equals _____.