What is the code for section 7?
I assume you’re referring to Unit 3?
You should be able to find example solutions in the teacher control panel on the right.
You won’t see this panel if your teacher account is not verified. If this is the case, you’ll need to verify your teacher account first: https://support.code.org/hc/en-us/articles/115001550131-Becoming-a-verified-teacher-CS-Principles-and-CS-Discoveries-only-