A pin fin (k=250W/mK) is attached to a wall. The fin's diameter is 1.5cm and it is 10cm long. The wall is at 200C. The surrounding air is at 15C and the convective coefficient is 9 W/m2.K. Determine the rate of heat transfer from the fin to the surrounding air if: (1) The fin has convection at the end. (2) The in has very long end