Following the in-class example, the black roof is painted with aluminum paint with an emissivity of 0.9 and an absorptivity for solar radiation of 0.5. The sun has an intensity of 300 Btu/hr-ft^2 and the ambient temperature is 68 deg F. For a rate of heat transfer by conduction-convection, use q/A [Btu/hr-ft^2]= 0.38(Troof-Tamb)^1.25, where the temperatures are in deg F. The blackbody temperature of space may be assumed to be -94 F. Under these conditions, the equilibrium temperature (deg F) of the roof is most nearly:

a. 68

b.100

c.136

d. 200