Dirty air: The federal government has enacted maximum allowable standards for air pollutants such as ozone. Let A be the number of days per year that the level of air pollution exceeds the standard in a certain city. The probability distribution of A is given by X 0 1 2 3 4 P (x) 0.32 0.38 0.20 0.06 0.04 Send data to Excel Part 1 of 2 V (a) Compute the mean Up. Round the answer to at least two decimal places. HX 1.12 Part: 1 / 2 Part 2 of 2 (b) Compute the standard deviation 6 . Round the answer to at least three decimal places. X 5