A triangular straight fin of 0.1 m in length, 0.02 m thick at the base, and 0.2 m in depth is used to extend the surface of a wall at 200°C. The wall and the fin are made of mild steel (k = 54 W/m°C). Air at 10°C (h = 200 W/m²°C) flows over the surface of the fin. Evaluate the temperature at 0.05 m from the base and at the tip of the fin. Determine the rate of heat removal from the fin and the fin efficiency. [Use MS-Excel to solve the problem and plot temperature profile].