2. The following cross frequency table reports the results of a survey asking people the number of drinks they had during happy hour on the previous Wednesday and whether or not they are married. tab married drinks, nof row drinks married 0 1 2 Total 0 100.00 1 100.00 Total 43.75 28.12 28.12 100.00 (a) (2 points) What is the average number of drinks a randomly selected person who participated in this survey had during happy hour on the previous Wednesday? (b) (4 points) What is the standard deviation of the random variable the number of drinks a randomly selected person who participated in this survey had during happy hour on the previous Wednesday? (c) (4 points) If a randomly selected person in this survey had one drink on the previous Wednesday, what is the probability that person is married