Assuming 95.0% efficiency for the conversion of electrical power by the motor, what current must the 12.0-V batteries of a 718-kg electric car be able to supply to do the following?

(a) accelerate from rest to 25.0 m/s in 1.00 min

 

(b) climb a 200-m high hill in 2.00 min at a constant 25.0 m/s speed while exerting 403 N of force to overcome air resistance and friction