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A poll asked people, some with, and some without, children under 18 years old if they frequently Frequently Experience experienced stress. The results are shown in the accompanying table. Complete parts (a) through Stress (c) below. Note: Your answers to each of these three questions should not be the same. Yes No Total With child under 311 209 520 18 years No child under 199 301 500 18 years Total 510 510 1020 ... .. a. Find the probability that a randomly selected person did not have a child under 18 years old, given that they said No. (Type an integer or decimal rounded to four decimal places as needed.) b. Find the probability that a randomly selected person said No, given that the person did not have a child under 18 years old. (Type an integer or decimal rounded to four decimal places as needed.) c. Find the probability that a randomly selected person from the group did not have a child under 18 years old and said No. (Type an integer or decimal rounded to four decimal places as needed.)