Please answer all the questions

2. How would you go about evaluating secondary data?why is evaluation important? 3. To which type of research design are focus groups best suited? Why do you say that? 4.What is the impact of research in terms of determining the need for marketing research? 5. what advantages does a company enjoy through maintaining its own internal marketing research department? 6.why are telephone surveys popular? Explain. 7. Identify at least three considerations that determine the format of a question, and indicate how each one would affect the format