A window is made of glass 5.20mm thick with dimensions 1.4m x 2.5m. On a cold winter day, the outside temperature is 20C, while the inside is 19.5C. a) At what rate is heat being lost through the window by conduction? b) If you covered the window with a sheet of paper 0.750mm thick what would be the new rate of heat loss? (Thermal conductivities: 0.05 W/mK for paper and 0.8 W/mK for glass)