A one-dimensional plane wall of thickness 2L=80 mm experiences uniform thermal generation of q= 1000 W/m^3 and is convectively cooled at x=±40 mm by an ambient fluid characterized byT infinity=20degreesC. If the steady-state temperature distribution within the wall is T(x) = a(L2-x2)+b where a=15oC/m2and b=40oC, what is the thermal conductivityof the wall? What is the value of the convection heat transfer coefficient?