a $1\mathrm{.}0$mx$1\mathrm{.}5$ m double pane window consists of two $4$mm thick layers of glass $($k$=\mathrm{.}78$ W$/$m$*$K$)$That are seperated by a $5$mm air gap $($Kair $=0\mathrm{.}025$W$/$m$*$K$).$ The heat flow through the air gap is assumed to be by conduction. The inside and outside air temperatures are $20$C and $-20$C$,$ respectively, and the inside and outside heat transfer coefficients are $40$ and $20$ W$/$m$^2*$K$.$ Determine

a$.)$ The daily rate of heat loss through the window in steady operation

b$.)$ The temperature difference across the largest thermal resistance