Your black and white ones look like Easter Eggers (mixed breed). Try taking individual pictures in better lighting for advice on the sex of them all. Welcome to the chicken community!
A group of lovely ladies!
I agree about individual photos in the future though
And the 2 black and white ones are easter eggers as the others have said, they should give you some nice colored egg when they start! Mine lay green or blue green eggs but you can also get blue (one of my lakeside eggers which is basically a designer easter egger lays blue) or occasionally pink eggs. Look forward to those eggs!
If you had any rhode island reds that were roosters you'd certainly know by now. They get rather large combs and wattles and start showing them pretty young. I agree with other posts=hens. The RIR are hens for sure, before they get ready to lay the combs will get larger and redder, mine started laying around 24-26 weeks but they can start sooner.