The temperature distribution in a certain plane wall is; T-T₁ = = C₁ + C2x² + C3x3 T2-T1 where T1 and T2 are the temperatures on each side of the wall. If the thermal conductivity of the wall is constant due and the wall thickness is L, derive an expression for the heat generation per unit volume as a function of x, the distance from the plane where T = T₁. Let the heat-generation rate be qo at x = 0.