Is this a white rock, mix, or other?

[Ferr41520]

Looks like a boy to me too.
So does the brown chick in the background.

The one to the back right? I’m questioning also the one next to this white with brown on left bc it has a bigger comb then the rest.

 

[The Happster]

The brown chick on the left is a boy. I can't see the one on the right very well but I think it's a pullet.

 

[Ferr41520]

That’s a cockerel!

Sure is! Got it on video crowing this morning! Not allowed to have roosters so now to decide what to do!