Consider a 400 mm by 400 mm window in an aircraft. For a temperature difference of 90℃ from the inner to the outer surface of the window, calculate the heat loss rate through L 12-mm-thick polycarbonate, soda-lime glass, and aerogel windows, respectively. The thermal conductivities of the aerogel and polycarbonate are kag = 0.014 W/m. K and kpc-021 W/m·K, respectively. Evaluate the thermal conductivity of the soda-lime glass at 300 K. If the aircraft has 130 windows and the cost to heat the cabin air is $1/kW h, compare the costs associated with the heat loss through the windows for an 8-hour intercontinental flight.