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 2 3 4 P(x) 0.34 0.36 0.17 0.09 0.04 Part: 0 / 2 Part 1 of 2 (a) Compute the mean My . Round the answer to three decimal places as needed. X