Consider a 1.5-m-high and 2.4-m-wide double-pane window consisting of two 3-mm-thick layers of glass (k = 0.78 w/m⋅k) separated by a 12-mm-wide stagnant airspace (k = 0.026 w/m⋅k). determine the steady rate of heat transfer through this double-pane window and the temperature of its inner surface for a day during which the room is maintained at 21°c while the temperature of the outdoors is −5°c. take the convection heat transfer coefficients on the inner and outer surfaces of the window to be h1 = 10 w/m2⋅k and h2 = 25 w/m2⋅k, respectively, and disregard any heat transfer by radiation.