Xiaobaitu and other experts: help on 485 filing

My 140 (NIW) has been approved last year and I am waiting to file 485. Now my hu*****and is filing EB1a, so that we can file 485 concurrently.

1. In form 485 and other forms, there is a question for A #. Should I fill in the A# which I got from my 140 approval notice or just leave it blank?

2. Is there a problem for me to get a EAD card through my hu*****and's application?

3. Will this would affect my future file 485, in case that my hu*****and EB1a was rejected?

Thank you in advance! Wish all have a prosperous Chinese New Year!