d) The record low observed surface pressure (in Typhoon Tip, 1979) was 870 hPa; the record high (Mongolia, 2001) was 1087 hPa. Air temperature at the surface can easily vary between -40 degrees C and +50 degrees C. Find the densities of air corresponding to all four possible combinations of the above extremes. e) Based on your answers to (d), which of the two variables, pressure or temperature, is typically responsible for the most pronounced variations in the density of air at sea level? Answer the question and use SI unit analysis in your answer.