Question 2 An airline serves up to two small packages of pretzel and up to Three bottles of water free per person on a specific route. The following Table reports The joint probability distribution of the number of pretzel packages and The number of bottles of water asked by any passenger. (Assume that The joint probability distribution function is approximately The same among different passengers on The same route, independent of the date and independent of the passenger.) Table 1: Joint probability distribution of pretzel packages and water bottles Pretzel packages Bottles of water 0 1 2 a) (10 points) What is the mean number of bottles of water asked by a passenger on this route? b) (10 points) What is the proportion of passengers who ask for Two bottles of water out of those who ask for two pretzel packages