Elevator that can withstand max passenger

An elevator has a mass of $600\text{ kg}$ (excluding passengers' mass). The elevator is designed to ascend, at a constant speed, a vertical distance of $20.0\text{ m}$ (five floors) in $16.0\text{ s},$ and is driven by a motor that can provide up to $40\text{ hp}$ to the elevator.

What is the maximum number of passengers that can ride in the elevator?

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Details and Assumptions:

• $1\text{ hp}=746\text{ watt}.$
• The mass of a passenger is $65.0\text{ kg}.$