Explanation:

User1 can delete File1 on March 10, 2023.
No - File1 has Retention1 applied, which retains it for 4 years with a "Retain only" action. This means it cannot be deleted during the retention period, which ends on March 1, 2027.
User2 can delete File1 on March 10, 2027.
No - User2 is a Member and does not have the Owner role, which is required to delete files under retention policies during the retention period. Additionally, the "Retain only" action prevents deletion until the retention period ends on March 1, 2027.
User2 can edit File2 on March 15, 2025.
No - File2 has Retention2 applied, which retains it for 2 years with a "Retain and delete" action. This means the file is protected from edits or deletions during the retention period, which ends on March 1, 2025. Since March 15, 2025, is after the retention period, the file would be eligible for deletion, but the question specifies editing, which is restricted during the retention period.