The responses of 1622 voters to a survey about the way the media conducted themselves in a recent politica campaign are shown in the accompanying Pareto chart. Find the probability of each event listed in parts (a) through (d) below. Click the icon to view the Pareto chart. (a) Randomly selecting a person from the sample who did not give the media an A or a B The probability is 0.775. (Type an integer or a decimal. Round to three decimal places as needed.) (b) Randomly selecting a person from the sample who gave the media a grade better than a D The probability is . (Type an integer or a decimal. Round to three decimal places as needed.)