Work, Energy and Power question for JEE Main (JEE Main 2023 (10 Apr, Shift 2)), with solution

If the maximum load carried by an elevator is $1400\ \text{kg}$ ($600\ \text{kg}$ passengers $+\ 800\ \text{kg}$ elevator), which is moving up with a uniform speed of $3\ \text{m s}^{-1}$ and the frictional force acting on it is $2000\ \text{N}$, then the maximum power used by the motor is ______ kW. ($g=10\ \text{m s}^{-2}$)