Family Based EAD and H1-B

[milwis]

I am on H1-B visa married to US Citizen spouse. My I-130 was approved before my spouse became citizen. Filled for AOS & EAD (I-485 & I-765) after spouses citizenship. I just received EAD Card and I-485 is pending.

1. Since I have received approved EAD, is my H1-B cancelled?

2. Am I suppose to let my employer, who processed my H1-B, know about
my EAD card?

3. If it is not required to let my employer know, then can I accept second
job on EAD while doing one job on H1-B?

Experts please advice.
Thanks