Lauren drinks a variety of soft drinks. Over the past month, she has had 15 diet colas, 3 cans of lemonade, and 7 cans of root beer. a. Given this history, what is the probability that her next drink will be a diet cola? Lemonade? Root beer? b. What definition of probability should be used to answer this question? a. The probability that her next drink will be a diet cola is (Round to two decimal places as needed.)