A wall has inner and outer surface temperatures of 16 and 6°C, respectively. The interior and exterior air tempera- tures are 20 and 5°C, respectively. The inner and outer con- vection heat transfer coeffcients are 5 and 20 W/m2 ⋅K, respectively. Calculate the heat fux from the interior air to the wall, from the wall to the exterior air, and from the wall to the interior air. Is the wall under steady-state conditions