Need help on H4/EAD extension

我们家绿卡处于485pending状态，H1B到期，公司说要renew H1B/H4，填表时遇到一些问题，请老师帮忙解答

1. My wife has the A-number from her previous H-4's EAD, should this A-Number be used in her I-539 form for H-4 extension?

2. For question "Has Form I-485, Application to Register permanent Residence or Adjust Status, EVER been filed by your or by any other persion included in this application?" in my wife's I539 form, should we answer "Yes" or "No" here? Since my wife has her 485 submitted along with my 485(主申请人).

3. For question 18 on I765 form, since I am still in H-1B renewing process and she falls into (C)(26) category, what receipt number I should put here?