The following table summarizes data on smoking status and age group, and is consistent with summary quantities obtained in a poll published in a particular article. Smoking Status Age Group Smoker Nonsmoker 18 to 29 174 518 30 to 49 333 1,115 50 to 64 284 1,445 65 and older 211 1,707 Assume that it is reasonable to consider these data as representative of the American adult population. Consider the chance experiment of randomly selecting an adult American. (Round your answers to three decimal places.) (a) What is the probability that the selected adult is a smoker