2. A thin vertical panel L = 3 m high and w = 1.5 m wide is thermally insulated on one side and exposed to a solar radiation flux of sun q′′ =750W/m2 on the other side. The exposed surface has an absorptivity of 0.87 α sun = for solar radiation; that is, 87% of the sun’s energy are absorbed whereas the other 13% are reflected. Assuming that the energy absorbed by the panel is dissipated by both natural convection and radiation (with a surrounding temperature of Tsur=300K, and a surface emissivity of εpanel = 0.85) into the surrounding quiescent air at atmospheric pressure and T[infinity] = 300 K, determine the surface temperature of the panel at steady state.