The first two look like Easter Eggers given the leg color and combs, and would vote girls so far . The third looks like a boy, might be an EE, or some sort of RIR / red bird cross with the yellow legs and single? comb.
All are mixed breed chickens. The first two could be Easter Eggers; the last one is some sort of production red cross. Last one appears to be a male, but they other two (for now) look like pullets. The first one in particular is very pretty!