When switch S in the figure is open, the voltmeter V of the battery reads 3.13 V . When the switch is closed, the voltmeter reading drops to 2.92 V , and the ammeter A reads 1.64 A . Assume that the two meters are ideal, so they do not affect the circuit.

part A-Find the emf. Express your answer in volts to three significant digits.

part B- Find the internal resistance of the battery.

part C-Find the circuit resistance.