my father got a letter at the post-office last month помогите пожалуйста написать 5 вопросов к этому предложению!!!

1.Who got a letter at the post-office last month?
2. When he got a letter at the post-office?
3.Where he got a letter last month?
4. What is he got at the post-office last month?
5. What did he do?.........