- Over sections 1 to 5 I will explain this problem.
- Through sections 1 to 5 I will explain this problem.
- From sections 1 to 5 I will explain this problem.
- In sections 1 to 5 I will explain this problem.
I'm not sure which preposition to use in the sentences above. If none of the first four I listed work, I'd appreciate it if you could suggest one that does work.