Try posting the pics in the following link for some predictions on gender. Best of luck!
https://www.backyardchickens.com/f/15/what-breed-or-gender-is-this
Greetings from Kansas bassbass, and ! Great to have you aboard. Fine looking birds - I can't tell if the last one is a hen or roo. You might want to post in the link below for more informed guesses. Good luck to you!
https://www.backyardchickens.com/f/15/what-breed-or-gender-is-this