Нужна помощь, всегда были проблемы с образованием вопросов

1. Общий вопрос

2. Альтернативный

3. Вопрос к подлежащему

4. Специальный вопрос

5. Разделительный вопрос

Вот само предложение:

They heard of him on the China coast

1. They heard of him on the China coast, didn't they?

2. Did they hear of him on the China coast?

3. Did they hear of him or her on the China coast?

4. Who heard of him on the China coast?

5. Where did they hear of him?

1. Did they hear of him on the China coast?

2. Did they hear of him on the China or India coast?

3. Who heard of him on the China coast?

4. Where did they hear of him?

5. They heard of him on the China coast, didn't they?