請教8老師I-485幾個問題

1. Nonimmigrant Visa Number from this passport(if any) ?

My mother's current 10-yr Visa is on an expired passport, so the number is printed on the expired passport, should I put this number here or leave it blank ?

2. For I-485 required documents, do I need all I-94 records or just the most recent record ?

3. Part 1, "US mailing address, In Care of Name (if any)" should I put my mother's name or leave it blank ? (My mom is currently living with me).

4. Part 8, "Have you EVER been a member of, involved in, or in any way associated with any organization, association, fund, foundation, party, club, society, or similar group in the United States or in any other location in the world including any military service?"

老母50年前曾是部隊野戰醫院的護士，還有也在部隊機場後勤部工作過， 在"Nature of Group"這一欄填什麽？

是填 "Military"? 還是填“Medical Service for Military" or "Logistics Service for Military"

再次感謝8老師。