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 3 1 2 Total B INLHIB 1 1&. Total 43.25 23.12 23.12 1E. {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? to} {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