The long horizontal rod is being heated at one end and provided an extended surface for heat transfer measurements. Thermocouples at regular intervals along the rod allow the surface temperature profile to be measured. Eight thermocouples (T1 to T8) are attached to the surface of the rod at equal intervals and one more thermocouple (T9) is used to measure the ambient temperature. When the temperatures are stable, the temperature values recorded are given in the following table. If the diameter of the rod is 1 cm, which of the following is the overall heat transfer coefficient (Wm 2K-)? (Hint: Calculate heat transfer coefficients for the radiation and the convection mechanisms. View factor=1, Emissivity of the surface= 0.95 and Stefan Boltzman constant is 56.7 x 10 Wm 2K-4)