Windows are often a source of heat loss during the winter. The use of double panes, where there is a gap filled with gas between window panes, can lower heat losses. For a window that is 1 m wide and 2 m tall, calculate the heat loss rate when: a) there is only a glass pane (5 mm thick) with an inside temperature of 15°, an outside temperature of -20°C, and a thermal conductivity of 1.4 W/m/K. b) there is an air gap (10 mm thick) with an inside edge temperature of 10°C, an outside edge temperature of -15°C, and a thermal conductivity of 0.024 W/m/K. Be sure to use each step of the problem solving process.