Somebody else who had the flashing screen thing said they turned on this setting to fix it:
But I haven't tested it myself, so I can't guarantee anything.
That's because you're not looking at it at 100%.
Remember, Moire must ONLY be judged at 100%. All other views give you a false indication.
https://www.damiensymonds.net/moire/
Thankfully she's looking fairly directly at the camera in all three photos, so it should be possible to copy and flip from the other side of her face in each case.
Try Standard LED first. From what I can find out about the specs that should do it.
However, if you get a funky result, try Wide LED.
No, I don't believe so.
Oh, nothing to it. Just use your rectangle marquee tool to select your whole stomach area (up to your lower bust) and Ctrl J it onto its own layer. Then convert that new layer to a smart object, then reduce its opacity to 50% while you enlarge it enough to cover the bare patch.
Then return to 100% opacity, and mask it in.