задайте 4 типа вопросов к предложению Nelly wrote letters to Moscow yesterday. Помогите плиз вообще не понимаю.

спасибо большое дай плиз ВК

1)Nelly didn't write letters to Moscow yesterday 2)Did Nelly write letters to Moscow yesterday 3)Who wrote letters to Moscow yesterday 4)When did Nelly write letters to Moscow?