In an apartment the interior air temperature is 20°c and exterior air temperatures is 5°c. the wall has inner and outer surface temperatures of 16°c and 6°c, respectively. the inner and outer convection heat transfer coefficients are 5 and 20 w/m2.k, respectively. calculate the heat flux 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?