A composite plane wall consists of a Li= 50 mm thick layer of insulation (ki= 0.05 W/m K) and a Ls= 25 mm thick layer of siding (ks- 0.10 W/m-K). The inner temperature of the insulation is 20C. The outer temperature of the siding is 10C. Steady state conditions apply. Determine the temperature at the interface between the two layers, in C, and the rate of heat transfer through the wall, in W per m of surface area. (10 points) Ti-20C -50 mm 1:22 + Insulation -0.05 W/m-K L-25 mm Siding ks-0.10 W/m-K T; --10C