Problem 1 (10 pts) Consider two marathon races: one in the middle of summer at 90 F and the other in the first weeks of fall where the temperature is 40 F. A) Using appropriate assumptions, determine the partial pressure of oxygen at 40 F and 90 F assuming an environmental pressure of 760 mmHg. B) Calculate the mole fraction of water in the air and the dew point temperature assuming the humidity was 55% on both days (for both days). C) What are the practical implications for a runner for parts A and B