再次请问8老师关于申请父母移民的问题。我知道要给爸妈分别填一份I-864表。现在我在填给我爸担保的I-864表，但是我没收入，要用老公的收入担保。是不是在这种情况下，我和我老公被称为joint sponsors? 现在I-864表里有些选项比较令人confused. 请8老师指教：
Part 1. Basis for Filing Affidavit of Support
下面改选哪一个？
1.a. ( )I am the petitioner. I filed or am filing for the immigration of my relative.
1.d. ( )I am the only joint sponsor.
1.e. I am the ( )first ( ) the second of two joint sponsors.
Part 3. Information About the Immigrants You Are Sponsoring
1. I am sponsoring the principal immigrant named in Part 2. 要在"Yes"前面打勾吗？
( ) Yes ( ) No. (Applicable only if you are sponsoring family members in Part 3 as the second joint sponsor)
要在下面 Item 2 打勾吗？
2. ( ) I am sponsoring the following family members immigrating at the same time.
Family Member 1
3.a. Famiy Name (此处要写我妈的姓吗？）
3.b. Given Name （此处要写我妈的名吗？）
Part 5 Sponsor's Household Size
Item 1，2，3，4，6 填 1 吗？ （我们有一个小孩）
Item 8 填 5 吗？
Part 6. Sponsor's Employment and Income (continued)
18.a. 里面的“You”是指我个人，还是指我的家庭的报税情况？
20. 如果18.a.里面是指家庭报税的话，那我第20题就不用打勾了吧？
提了很多问题。盼望答复，太感谢了！