I have the answers, but need the work through. Thermodynamics question. Thx!

A heat pump cycle is used to keep a building's inside temperature at 22C, when the outside temperature is at 10C. The heat pump consumes 4kW of power and extracts 24 kW of heat from the cold outdoors. Determine the second-law (exergetic) efficiency of this heat pump. The operation is steady state and effects of kinetic and potential energy are negligible. Answer: 28.5% A heat pump cycle is used to keep a building's inside temperature at 22C, when the outside temperature is at 10C. The heat pump consumes 4kW of power and extracts 24 kW of heat from the cold outdoors. Determine the second-law (exergetic) efficiency of this heat pump. The operation is steady state and effects of kinetic and potential energy are negligible. Answer: 28.5%