Hen or Rooster?

[CarpeDiem]

I have 6 chicks. Any thoughts on gender?
There is:
1 Barred Rock (8 weeks)
1 Calico Princess (8 weeks)
2 California White Cross (9 weeks)
2 Black Australorps (9 weeks)
-1 has a lot of brown feathers
Thank you!

 

[Mamatomany123]

Calico princess and 1 of the white crosses are pullets. Not sure about the barred rock. The rest are cockerels.

 

[Pretty Birds]

The barred rock is a pullet.