Help with sex and breed?

[tparks2016]

please enjoy our little "farm" i am starting to wonder if they are boy or girl and what breeds i have .... First year and all i didnt pay much attention...
They are about 4 months old by my count

Any help is appreciated.... thanks

 

[I Love Layers]

Australorp, Rhode Island, Leghorn, Barred Plymouth Rock.
Just guesses and they are the most common that feed stores purchase in bulk