The EPA has ordered sizable reductions in NOx emissions from electric power plants to control ozone levels in the eastern United States. Assume that power plants account for half of the total NO, emissions in a region where the current air quality concentrations of NO and VOC are 100 ppb and 800 ppbC, respectively. (a) If power plant NOx emissions are reduced by 80 percent, how much improvement in O3 levels can be expected based on the isotherm diagram given in the notes? Give your answer both as an absolute value (in ppb) and as percentage change. (b) How would your answer to part (a) change if the VOC concentration were 1200 ppbC?