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(a) What is the equivalent resistance of four resistors connected in series with a 13.0-V battery if each resistor has a value of 23.0 n? 2 (b) Determine the current flowing through each of the four resistors. A (c) If the four resistors were instead connected in parallel across the battery, what would be the equivalent resistance? (d) Determine the current through each resistor for this parallel connection. A