event sales and marketing

Hope for the answer after reading the entire attachment plz

1- Explain the role of secondary data in gaining customer insights.Where do marketers obtain secondary data, and what are the potential problems in using such data? 

2- What are the advantages of Web-based survey research over traditional survey research? 

3- Compare open-ended and closed-ended questions.When and for what is each type of question useful in marketing research? 

4- Summarize an article describing a marketing research study. Describe how the data were collected. Is the research objective exploratory, descriptive, or causal? Explain your conclusions.