A double-pane insulated window unit consists of two 1-cm-thick pieces of glass separated by a 1.8-cm layer of air. The unit measures 4 m in width and is 3 m wide. Under conditions where the extreme outside temperature of the glass is at −10∘C and air, at 27∘ C, is adjacent to the inside glass surface, with hi=12W/m2⋅K, determinea. the inside glass surface temperatureb. the rate of heat transfer through the window unitThe air gap between glass panes may be treated as a purely conductive layer with k=0.0262W/m⋅K. Thermal radiation is to be neglected.