The amount of pollutants that are found in waterways near large cities is normally distributed with me ppm and standard deviation 1.4 ppm. 35 randomly selected large cities are studied. Round all answers decimal places where possible. a. What is the distribution of X? X ~ N( 8.7 1.4 b. What is the distribution of a? a ~ N( 8.7 .2366 c. What is the probability that one randomly selected city's waterway will have more than 8.7 ppm pollutants? d. For the 35 cEnter, an integer or decimal number, accurate to at east 4 decimal places [more,], more than 8.7 ppm. e. For part d), is the assumption that the distribution is normal necessary? O No Yes f. Find the IQR for the average of 35 cities. Q1 = ppm Q3 = ppm IQR: ppm