11 12 13 14 15 16 Dirty air: The federal government has enacted maximum allowable standards for air pollutants such as ozone. Let X be the number of days per year that the level of air pollution exceeds the standard in a certain city. The probability distribution of X is given by X 0 1 2 3 4 P (x) 0.35 0.40 0.18 0.04 0.03 Send data to Excel Part 1 of 2 (a) Compute the mean up. Round the answer to at least two decimal places. Hy- 1.00 Part: 1 / 2 Part 2 of 2 (b) Compute the standard deviation o. Round the answer to at least three decimal places. Ox= X