Wall consists of three material layers with a surface area $A=5m^2$ and surface temperatures of $22$

$C$ and $40C,$ hi and ho is $8$ and $40\frac{W}{m}.K.$ Calculate the heat flow through the layers:

Block cement Thickness $(180mm)$ Material k $(0\mathrm{.}6\frac{W}{m}.K)$

Insulation $(50mm)$ Material $k(0\mathrm{.}03\frac{W}{m},K)$

Morter $(30mm)$ Material k $(1\mathrm{.}2\frac{W}{m}.K)$

Limestone $(50mm)$ Material k $(1\mathrm{.}7$ W$/$m$.$K$)$

Calculate the total U$-$value of the wall $(5$ marks$)$

Find the temperature distribution in the layers $(5$ marks$)$

Find the heat transfer in this wall $(5$ marks$)$

Imagine that Window $($U$-$value $=2\frac{W}{m}2.k)$ with an area $2\mathrm{.}5m2$ added to this wall. Give

me the equivalent $U-$value for this wall with this window. $(5$ marks$)$