Please answer the third one!

1. Using the amount of solar power absorbed by the earth (earth as a disk) and the Boltzmann equation (the radiating surface area of the atmosphere as a sphere), use trial and error to calculate the outer atmospheric temperature. Assume the earth is at steady state, the temperature of space is 3K, and the overall thermal resistance of the atmosphere (R) is 0.13m2C/W. Assume also that all the heat escaping the earth is radiated from the atmosphere (ignore the 4% from the earth's surface). 2. Using the results from part 1 (Temp of outer atmosphere =19.9C ), calculate the average surface temperature of the earth using the overall heat transport equation given above. Question: If there was no atmosphere, what would be the temperature of the earth's surface? [This is not the same thing as assuming that there is no atmosphere, since that would change reflectance and SR absorbed at the surface. We just want to see how the "blanketing" effect of the atmosphere increases temperature. Use both atm sphere area and earth sphere area.] 3. If the overall resistance to the atmosphere increases by about 7% (to 0.14m2C/W ) what would be the new surface temperature of the earth? Is this change big enough to matter? [Use R =0.14, not 0.13]