A thermopane window consists of two pieces of glass 7 mm thick that enclose an air space 7 mm thick. The window separates room air at 20°C from outside ambi- ent air at -10°C. The convection coefficient associated with the inner (room-side) surface is 10 W/m². K. (a) If the convection coefficient associated with the outer (ambient) air is h, 80 W/m². K, what is the heat loss through a window that is 0.8 m long by 0.5 m wide? Neglect radiation, and assume the air enclosed between the panes to be stagnant. (b) Compute and plot the effect of h, on the heat loss. for 10 h, 100 W/m² K. Repeat this calcula- tion for a triple-pane construction in which a third pane and a second air space of equivalent thick- ness are added.