Is the following wording correct?

1. To make the questionnaires about K-dramas for teachers and students around me at school
2. To gather K-dramas related materials on the Internet, newspapers, and magazines
3. To research why Korean soap operas are so popular around the world
4. To research what reasons for the success of Korean soap operas are
5. To research how K-dramas go global via Internet
6. To research what effects Korean soap operas bring
7. To analyze what plot conventions can be found in nearly every Korean drama
8. To generalize what various genres there are in K-dramas