Are my babies roosters or hens?

[chickieluver26]

I've got four 2 1/2-3 month old OEGB and serama chicks.
#1 (rooster?)

#2 (rooster?)

#3 (hen?)

#4 (hen?)

Please help, thanks!!!

 

[Wyandottes7]

I agree with all your guesses.