父母绿卡填写864表和864a表的问题

我和我姐姐都各自有单独家庭，我是主申请人，我姐姐作为联合申请人，现在填写864表和864a表遇到几个问题，还请老师解答，谢谢！

1. 我填写的864表中的house hold member和sponsor都应该是谁？

2.我姐姐填写的864a表中的house hold member 和 sponsor都应该是谁？

3. 864a表中 Part 5项, Intending Immigrant Number 1 和 Intending Immigrant Number 2 分别填写了我父亲和母亲的信息。那么在

I, THE SPONSOR,in consideration of the household member's promise to support the following intending immigrant(s) and to be jointly and severally liable for any obligations I incur under the affidavit of support, promise to complete and file an affidavit of support on behalf of the following named intending immigrant(s). (Indicate Number)这一项中，Indicate Number应该填2对吗？

 

谢谢解答！