A 3.0 resistor, an 6.0 resistor, and a 9 resistor are connected in series with a 20 V battery. (a) What is the equivalent resistance? (b) What are the currents in each resistor? A (3.0 resistor) A (6.0 resistor) A (9 resistor) (c) Repeat for the case in which all three resistors are connected in parallel across the battery. (equivalent resistance) A (3.0 resistor) A (6.0 resistor) A (9 resistor)