A $4-$m$-$high and $6-$m$-$wide wall consists of a long $18-$cm X $30-$cm cross section of horizontalbricks $($k $=0\mathrm{.}72$ W $/$m C$)$ separated by $3-$cm$-$thick plaster layers $($k $=0\mathrm{.}22$ W $/$m C$).$ There are also $2-$cm$-$thick plaster layers on each side of the wall, and a $2-$cm$-$thick rigid foam $($k $=0\mathrm{.}026$ W$/$m C$)$ on the inner side of the wall. The indoor and the outdoor temperatures are $22\backslash$deg C and $-4\backslash$deg C$,$ and the convection heat transfer coefficients on the inner and the outer sides are h$1=10$ W$/($m$2\backslash$deg C$)$ and h$2=20$ W$/($m$2\backslash$deg C$),$ respectively. Assuming one$-$dimensional heat transfer and disregarding radiation, determine the rate of heat transfer through the wall