An aliminium fin with a thickness of 1.0 mm and a thermal conductivity k of 205 W/mC is attached to a circular tube with an outer diameter of 3.0 cm. The fin has a lengt of 7 mm. The tube wall is maintained at a tempereture of 120 C. While the surrounding environment temperature is 20 C. The convection heat transfer coefficient between the fin and the environment is 15 W/m2C. The fin efficiency value is 0.945. Calculate the amount of heat lost in Watt by the fin? Calculate the value of Lc in mm ? Calculate the maximum heat lost in watt by the fin