Hard to tell. The last one either has some over-sharpening done in Photoshop or it’s the AI one. The depth of field of the foreground objects looks weird as well.
Discussion
Just number 2, the other ones are from photographers 🙂
That’s crazy … it’s hard to tell even if you know it (i.e. from hairs coming out of her beanie).
On the other hand even regular photos are created with software these days and have artificial portrait effects, post processing and the like.