The Sonic Travel Agency has not kept pace with the current boom in family vacation air travel between the agency's northern city and sunny Florida. For each of the following, indicate whether the associated data are primary or secondary. If the data are secondary, further indicate whether they are internal or external.
a. Sonic's research department conducts a survey of past customers to determine their level of satisfaction with the agency's service.
b. The Florida Bureau of Tourism sends travel agencies across the nation the results of a study describing the characteristics of winter vacationers to the state, including where and how long people tended to stay.
c. To get a better grasp of the problem, the president of Sonic examines the company's annual reports for the past 10 years.