In problem 0-4-3[BEZ], assume the energetic efficiency (work transfer to the elevator (desired) to the electrical work transfer (required) to the motor), , of the

In problem 0-4-3[BEZ], assume the energetic efficiency (work transfer to the elevator (desired) to the electrical work transfer (required) to the motor), η, of the system to be 80%,
(a) Determine the power consumption rate by the motor (magnitude only).
(b) Assuming electricity rate is 20 cents per kWh, determine the energy cost of operation in cents.