B2 visa.pls give an advise

[ksu84]

Hello everybody!

I am expecting my GC (through marriage) in 30 days. Me and my husband are trying to invate my sister for 6 months. She is divorsed and have a child (he is not coming with her).
...I`m filling the DS156 for her...
1) WHAT SHOULD I ANSWER ON QUESTION "When Do You Intend To Arrive In The U.S.?".... I know approx. the month, but I do not know the date..???

2) CAN MY HUSBAND FILL OUT THE AFFIDEVIT OF SUPPORT FOR MY SISITER?

3) DO WE HAVE TO BUY AIR TICKETS BEFORE THE INTERVEW?

THANK YOU VERY MUCH FOR ANY KIND INFORMATION!!!

[immihelp]

1. Write whatever you know.
2. Yes.
3. No.