2) A steel pipe with inside diameter of 4.5cm anid outside diameter of 5cm is covered with a 1.cm layer of insulating material having k=0.3W/m. "C followed by a 2-cm-thick layer of another insulating material having k=0.1W/mC. The entire assembly is exposed to a convection surrounding condition of h=50W/m2,C and T=25C. The inside surface temperature of the steel pipe is 350C and the steel thermal conductivity (k) is 50W/mC. (a) Calculate the heat lost by the pipe-insulation assembly for a pipe length of 10m. Express in Watts (20 points). (b) Determine the temperature at the surface of each insulation layer (15 points)