A heat pump is to be used to heat a house in winter and then reversed to cool the house in summer. The interior temperature is to be maintained at 20°C. Heat transfer through the walls and roof is...

A heat pump is to be used to heat a house in winter and then reversed to cool the house in summer. The interior temperature is to be maintained at 20°C. Heat transfer through the walls and roof is 0.525 kJ/s per degree temperature difference between the inside and outside. (i) If the outside temperature in winter is 5°C, what is the minimum power required to drive the heat pump?