1. A composite wall separates two regions at different temperatures: The four regions are composed of: A : Fir wood with KA=0.11W/(mK) and thickness L1=2.5cm x B: Concrete block with KB=0.76W/(mK) and thickness L2=7.5cm xC : Brick with kcc=0.69W/(mK) and thickness L2=7.5cm D: Pine wood with KD=0.147W/(mK) and thickness L3=5.0cm The concrete and brick layers have equal thickness, z. At the left side of the wall, there is convection with a heat transfer coefficient, h1, of 12W/(m2K) to fluid at T1, of 370C. At the right side, there is convection with a heat transfer coefficient, h2, of 25W/(m2xK) to fluid at T2, of 66C. The system is steady. a. Draw the thermal circuit for the wall. b. Determine the heat flux, q" (in W/m2 ), through the wall. c. What percentage of the heat transfer travels through the brick