A12-m-long and 5-m-high wall is constructed of two layers of 1-cm-thick sheetrock (k = 0.18 w/m.°c) spaced 16 cm by wood studs (k = 0.12 w/m.°c) whose cross section is 16 cm×5 cm. the studs are placed vertically 60 cm apart, and the space between them is filled with fiberglass insulation (k = 0.035 w/m.°c). the house is maintained at 25°c and the ambient temperature outside is -10°c. taking the heat transfer coefficients at the inner and outer surfaces of the house to be 8.3 and 34 w/m2 . °c, respectively, determine (a) the thermal resistance of the wall considering a representative section of it and (b) the rate of heat transfer through the wall. (30 points)