Hen or Rooster

[Russell2000]

I need to know if these chickens are hens or roosters. I know the cage there in is cramped so the pic isnt good but this is what they have them in at an auction I'm at. I'm pretty sure they are Light Brahma Chickens but I'm having difficulty determining sex based off the features

 

[Heatherella]

I have Light Brahmas that are close to this age. The one on the right looks like a Roo compared to my pullets. I can’t tell on the others.

 

[Mylied]

I think there's one roo and 3 hens.

 

[Mylied]

4 hens maybe. Can't see that one in the back too well.