A room is constructed of an inner layer of $35\mathrm{.}4mm$ of pine wood, a middle layer of $72\mathrm{.}8mm$ of chip board and an outer layer of $28\mathrm{.}1mm$ concrete. The wall surface temperature is $382K$ inside the room and $275\mathrm{.}4K$ at the outside surface of concrete. The wall dimensions were $2\mathrm{.}6m$ high and $1\mathrm{.}8m$ wide. Calculate the $($i$)$ total thermal resistance, $($ii$)$ heat loss, $($iii$)$ temperature at the interface between pine wood and chip board & $($iv$)$ temperature at the interface between chip board and concrete. Given: $k_{\text{p}\text{i}\text{n}\text{e}}=0\mathrm{.}151$;$k_{\text{b}\text{o}\text{a}\text{r}\text{d}}=0\mathrm{.}0433$; and $k_{\text{c}\text{o}\text{n}\text{c}\text{r}\text{e}\text{t}\text{e}}=0\mathrm{.}762\frac{W}{m}.K.$