The starter motor in an automobile has a resistance of 0.40 in its armature windings. The

The starter motor in an automobile has a resistance of 0.40 Ω in its armature windings. The motor operates on 12 V and has a back emf of 10 V when running at normal operating speed. How much current does the motor draw
(a) When running at its operating speed,
(b) When running at half its final rotational speed, and
(c) When starting up?