You're right about the white one being a roo I think.
Legs are chunky and that's quite a comb going on. Could be anything breed wise though, some chicks are born yellow or white and then by adulthood they're speckled, black/brown, you name it. Will have to wait at least 2 months before having any idea.
Speckly one, if it came from a green egg, chances are it's a cross.
Because most chickens are blue egg layers, they have to be crossed with a brown egg layer to make a green egg. So that means the mum was a cross, so this little one is at LEAST a mix of 3 breeds.
Looks a bit like a Cream Legbar/welsummer thing, but hundreds of breeds have stripes down their heads and eyelines. I'm assuming she had 'chipmunk' marking when she was born? Could be anything, but looks like a girl from here.
It might be worth you asking what breeds they had running around together, but saying that, my eggs came from a lady who had over 300 chickens, 18 different breeds and 40 colour varieties, and I still don't know what mine are and probably never will....that is the joy of rearing mutts I guess!
Good luck!