1.1 (20 points) On a recent survey, 500 Americans were asked "How many days in a week do you discuss politics with friends or family?" The table below presents the frequencies of responses and an empty column for the corresponding probabilities. Number of Days Frequency Probability 102 204 118 236 70 .140 AWN 53 106 25 050 5 47 094 33 066 52 104 a) Fill in the probability column. What is the probability that a randomly selected person talks about politics four days per week? b) Conditional on talking about politics at least once per week, what is the probability that a randomly selected person talks about politics more than three days per week? c) What is the 50th percentile (median) response in the sample