A 75.0-Ω and a 60.0-Ω resistor are connected in parallel. When this combination is connected across a battery, the current delivered by the battery is 0.166 A. When the 60.0-Ω resistor is disconnected, the current from the battery drops to 0.0770 A. Determine (a) the emf and (b) the internal resistance of the battery. (a) Number Units (b) Number Units