4.62 A steady-state, finite-difference analysis has been performed on a cylindrical fin with a diameter of 12 mm and a thermal conductivity of 15W/m K. The convection process is characterized by a fluid temperature of 25°C and a heat transfer coefficient of 25W/m2 K. If the temperature of the first three nodes, separated by a spatial increment of delta x = 10 mm, are T0 =100 degree C, T1 =93.4 degree C, and T2 = 89.5 degree C, determine the fin heat transfer rate. Determine the temperature at the node 3, T3.