Problem 1 Given: A composite consisting of five sections, as shown in the figure. 3 cm 2 cm 3 cm, 5 24 cm 8 cm 6 cm 2 cm T-20°C, T-80°C and h-15 W/m²K on both sides k-k, 80 Wim-K, k, -120 W/m K K 100 W/m-K and k, 150 W/m-K Find: Construct the thermal circuit model find the thermal resistance and heat transfer rate through the composite.