Answer to Question 1
Advantages of secondary data include lower financial and time costs. Disadvantages relate to the extent the data fit the information needs of the project in terms of aggregation, accuracy, and timeliness.
Answer to Question 2
Researchers planning a questionnaire's design must make several decisions, which typically take place in the following sequence:
(1) What should be asked?
(2) How should questions be phrased?
(3) In what sequence should the questions be arranged?
(4) What questionnaire layout will best serve the research objectives?
(5) How should the questionnaire be pretested? Does it need to be revised?