5. a. Calculate the temperature regarding the heat loss through a brick wall of 8 m long and 5 m high. The brick wall of 200 mm thick have the glass of 70 mm. The brick has the thermal conductivity of 0.72 W/m.K, while that of glass is 0.78 W/m.K. Given that the temperature of the exposed brick wall is 35C and that of the glass is 20C. b. A rubber water tank of thickness 50 mm contains water at 60C and the outside temperature is 25C. The thermal conductivity of rubber is 0.13 W/m.K, and the convective heat transfer coefficient of water and outside air are 3000 W/m2K and 25 W/m2K respectively. Calculate the temperature of the outside surface of the tank