An insulating wall 16 cm thick has one face at 600°C while the other is at 100°C. The thermal conductivity of the material is given by k = 0.078 (1 + 17.95 × 10-4 T) W/mK and T is in °C. Determine the heat loss per unit area and the mid plane temperature. Make sure you explain your answer in detail, as well as, list all steps leading to your answer.