Applying i-485 for my wife while my i-485 is pending

[preeti]

hi guys,
I have my i485 pending EB4, is that possible to apply 1-485 and EAD for my wife who is here on visitor visa.If that is possible Then i have these questions:
0-What documents are needed to submit her I-485?
1.Would my wife need to go back to my home country after her current I-94 expires??
2.Or will she remain in status while in US when i file for her I-485??
3.If her I-485 does not get approved would her multiple visa will be canceld??
Please help immmideitly?
Thanks,

[immihelp]

0. Read https://www.immihelp.com/i-485-adjus...s-application/

1. No.

2. Yes

3. That really depends upon the reason why her I-485 would not be approved.

I also suggest you read https://www.immihelp.com/i-485-adjus...or-dependents/