Noun Clauses

1. Please tell me what you ate last night.
2.Please tell me what did you eat last night
3.Please tell me how many books you have,
4. Please tell me how many books do you have
5. Please tell me how long you studied last night.
6. Please tell me how long did you study last night.
7. Please tell me what country you like?
8. Please tell me what country do you like?
9.Please tell me what sports you like?
10. Please tell me what sports do you like?

I know 1 3 5 7 and 9 are correct but are the others acceptable grammatically? Thanks Fulvio