if u can explain step by step it would be great thank you

Air flows at 120C in a thin-wall stainless-steel tube with b=65W/m2C. The inside diameter of the tube is 2.5cm and the wall thickness is 0.4mm:k=48W/m+C for the steel. The tube is exposed to an environment with h=6.5W/m2=C and Tx=15C. 1) Calculate the overall heat-transfer coefficient and the heat loss per meter of lenghh. 2) If a 10mm thick layer of calcium silicate insulation (ka=0.050W/m. K) is applied to the tube. a) Draw the profile temperature and heat flux b) Determine the value of heat loss per meter of leagth. c) Investigate the temperature of pipe contact with steam stream