The 2.44 m high exterior wall of a backwoods shack is constructed of 16-mm-thickcedar boards that form the outside surface of the shack's wall, 38-mm by 90-mm pine studs on

406-mm centers with glass-fiber insulation batts between the studs, and a 10-mm-thick inside wall made of plywood. The exterior wall construction includes a sole plate that uses 38 x 90 pine studs, and a top plate that uses two 38 x 90 pine studs.The outer surface of the exterior wall is exposed to air having a convection coefficient ofh= 35 W/m K, and the inner surface of the wall is exposed to air having a convection coefficient of h =8 W/m² K. Assume k-0,11 Wm K for cedar boards,=0.14 W/m K for pine, k =0.038 W/m K for glass-fiber insulation batts, and=0.12 W/m- K for plywood.Pine a) Find the heat transfer coefficient U for each section of the exterior wall.Answers: U. -0.3635 W/m K for sections with glass-fiber insulation batts and0,=0.9754 W/m-K for sections with pine studs b) Find the overall heat transfer coefficient for this type of exterior wall construction.Answer: U =0.4467 W/m K