Задайте 5 типов вопросов к предложению: The European Union signed a customs cooperation agreement

1. Did the European Union sign a customs cooperation agreement? 2. What Union signed a customs cooperation agreement? 3. The European Union signed a customs cooperation agreement, didn't it? 4.  Did the European Union sign a customs cooperation agreement or some other type of agreement? 5. What type of agreement did  the European Union sign?