A one-dimensional plane wall of thickness L is constructed of a solid material with a linear, nonuniform porosity distribution described by ε(x) = ε_max(x/L). Plot the steady-state temperature distribution, T(x), for k_s = 10 W/m · K, k_f = 0.1 W/m · K, L = 1 m, ε_max = 0.25, T(x = 0) = 30°C and q"x = 100 W/m² using the expression for the minimum effective thermal conductivity of a porous medium, the expression for the maximum effective thermal conductivity of a porous medium, Maxwell’s expression, and for the case where k_eff(x) = k_s.