Use figure $7$ chart for below grade walls. For a house, the insulation added to the basement wall has a thermal resistance R$=2\mathrm{.}2($m$2$K$)/$W$,$ and the insulation extends $1200$mm below grade. Determine the heat loss factor obtained from the chart provided in W$/$m$$K$.$ Note that the foundation walls extend $1790$mm below grade,