The average thermal conductivity of the walls (including windows) and roof of a house in Figure P11.32 is 4.8 10-4 kW/m°C, and their average thickness is 20.0 cm. The house is heated with natural gas, with a heat of combustion (energy given off per cubic meter of gas burned) of 9300 kcal/m3. How many cubic meters of gas must be burned each day to maintain an inside temperature of 28.0°C if the outside temperature is 0.0°C? Disregard radiation and loss by heat through the ground. The house's dimensions are 10.0m x 8.0m x 5.0m I tried this problem, and I keep getting the answer completely wrong... if anyone could show me how to do this one, that would be awesome. Thanks.