solved I don’t understand this Case Studies question and need help

I don’t understand this Case Studies question and need help to study.

This activity asks you to analyze a report that uses research to accomplish its purpose.
Pick one of these reports to analyze:

Research_Clean Air_Exemplar   download                
Research_Inclusive Ed_Exemplar download                
Research_Substance Use_Exemplar   download                
Research_Traffic_Exemplar   download                

As you skim the report, focus on the research included in each section. As you do, answer the following questions:

What is the purpose of the report?
What types of research do you see in the report? (Think back to Ch. 2 from Just Enough Research.)
How is the research being used? How does the research contribute to the achievement of the report’s purpose?
Which sections have the most research? Why do you suppose that is?