A large plane wall, with a thickness L and a thermal conductivity k, has its left surface (x = 0) exposed to a uniform heat flux q̇₀. On the right surface (x = L), convection and radiation heat transfer occur in a surrounding temperature of T_∞. The emissivity and the convection heat transfer coefficient on the right surface are e and h, respectively. Express the boundary conditions and the differential equation of this heat conduction problem during steady operation.