Examine the conditions of Example 9.4, including the effect of adding insulation of thickness t, thermal conductivity k = 0.026 W/m ∙ K. and emissivity B = 0.85. Compute and plot the surface temperature Ts.2 and the heat loss q' as a function of insulation thickness for 0 < t < 50 mm. In addition to adding insulation, the heat loss may be reduced by decreasing the surface emissivity of the insulation. For t = 25 mm compute and plot Ts.2 and q' as a function of the emissivity for 0.1 < B < 1.0.