a) A steel containment wall, 25mm thick and 50000 square meter surface area, is used to maintain an inside temperature of 150C. The outer side of the containment is naturally cooled by air convection at a temperature of 30C. The internal side of the containment experiences condensation heat transfer with heat transfer coefficient of 1,000W/m2C. The heat transfer coefficient of the natural air convection is 5W/m2C. The thermal conductivity of the wall is 40W/mC. Calculate the heat rejection rate through the containment. (7 Marks)