Physics problem please help, desperate for help....?

An elevator has m 660 kg, not including pengers. The elevator is designed to ascend, at constant speed, a vertical distance of 20.0 m (five floors) in 17.0 s and it is driven by a motor that can provide up to 42 hp to the elevator. What is the maximum number of pengers that can ride in the elevator? ume that an average penger has a m of 67.0 kg.