FunClucks
Crowing
I have a Production Red rooster, and a variety of hens, but no RIR. I'm pretty confident that chicks 3 and 4 are females. Top two could be roosters, but it's not terribly obvious yet. Give them a few more weeks - check back at 6-8 weeks, and also put up pics of your known females at 6-8 wks of age, and I would have more confidence in my answer.
Welcome to BYC! They're cute, whatever they are!