Suppose that the rate of convection heat loss from a pipe is 35.6 W for a pipe that is 1.5 m in length and has an outer diameter of 2 cm. The air temperature is 23C, and the surface temperature of the pipe is equal to 50C and is approximately constant over the entire surface of the pipe. a. What is the convection heat transfer coefficient for the air? b. Assuming that the convection heat transfer coefficient for the air remains the same as you calculated in part a and that the temperatures of the pipe surface and air remain the same, calculate the rate of heat transfer from the pipe if 20 annular aluminum fins are affixed to the outside of the pipe; each fin has a thickness of 0.4 cm and an outer radius of 10 cm, and the fins are uniformly spaced along the pipe. The thermal conductivity of aluminum is 240 W/m/K. You should calculate the heat transfer from the bare surface of the pipe and the heat transfer from the fins.