answer a,b,c please .

For a composite wall made up of three different materials, where Wall 1 is 1:4 dry concrete, Wall 2 is kaolin insulating brick, and Wall 3 is building brickwork. The three walls have a thickness x of 1ft and an area of 0.5ft2 each. The two convective heat transfer coefficients, hi and ho, you may assume are both equal to 2Btu/ft2hF. The inner fluid temperature Tfi is 260 F and the outer temperature Tfo is 80F. (a) Find the individual three conductive resistances, the two convective resistance and the total resistance in ft2Fhr/Btu (b) The total rate of heat transfer, Q, in Btu/hr (c) The surface temperature of the third wall in F(Ts3) Diagram of composite wall: The thermal conductivities of the materials are as follows: kconcrete=0.44Btu/ft2hF,kkaolin=0.05Btu/ft2hF,kbuildbrick=0.44Btu/ft2hF