Suppose you have an old house with a poorly insulated window and wooden wall in the winter. You keep your house at 30 C and the surface temperature on the outside of your house can be assumed to be 0 C. Your glass window is 0.5 m wide and 1 m tall with a thermal conductivity of roughly 0.8 W/mK while the wooden wall is 5 m wide and 3 m tall with a thermal conductivity of roughly 0.12 W/mK. You measure the temperature of the inside surface of your wall to be 25 C. You can assume no convection currents through the wall or around the window. 1) Assuming the wall (window and wood) to be 4 cm thick, what is the heat flux through the wall