Need help sexing and breed

[Fire06]

Hey everyone, bought these four as barnyard mixes but wondering if you could give me an idea what breed they might be and sex. They are 11-12 weeks old right now. Thanks in advance.

 

[chickenlittle21]

I see a black australorp/ bantam mix, a barred olive egger, a black cochin/ Easter egger mix, and a barred rock/ polish mix

 

[Rhodebar Lover]

Barred ones are cockerels. Probably part Barred Rock or maybe Cuckoo Marans and part something crested, maybe Polish or Cream Legbar, one with pea comb probably part Easter Egger. Black one with feathered legs seems to have pea comb too, so part EE and maybe Black Marans or Cochin. Other black has smaller body type and can't see comb. Maybe part bantam or light breed