I want to know the answer to the following question:
When did Hai Gaon refer to questions that had been addressed to him from Ashkenaz?
All the background I'm provided with is that "In the first half of the 11th century, Hai Gaon refers to questions that had been addressed to him from Ashkenaz, by which he undoubtedly means Germany.". Is that enough to answer the question?
Answer: yes