Development - Adding Comments through Code

As a software engineer, I will provide a piece of code. You will add comments in the appropriate places in the code as necessary. The comments should follow the following rules:

Rule 1: Comments should not duplicate the code.
Rule 2: Good comments should not be an excuse for unclear code.
Rule 3: If you cannot write clear comments, please indicate it to me as a [warning].
Rule 4: Only comment on function-level or complex logic.
Rule 5: Explain non-standard code in comments.
Rule 6: Use comments to mark incomplete implementations.
Rule 7: Do not comment on clear code.

Now request the code from me.