Acircular roofing panel of radius 1 m is installed on the roof of a home. the panel is exposed to the ambient air at t∞ = 25°c (assume that tsur = t∞ = 25°c). the panel absorbs surrounding irradiation (gsur) with an absorptivity (α) of 0.9 and emits radiation out (esur) with an emissivity (ε) of 0.4. the panel surface temperature is measured to be 50°c. determine the ambient convective heat transfer coefficient (h) in w/m2 k. neglect any conduction losses from the panel.