Surface A in the figure is coated with white paint and maintained at temperature of 27°C. It is located directly opposite to surface B which can be considered a black body and maintained at temperature of 727°C. Calculate the amount of heat that needs to be removed from surface A per unit area to maintain its constant temperature. (Consider emissivity of the white paint = 1 and view factor = 1, σ = Stefan-Boltzmann constant)