That first one has a dainty head and elegant neck - and the way her tail fans out - I'd almost guess she's part hamburg... the others are kind of hard to see... but age and size are helpful when identifying - and you'd be amazed the variety that can come out in a mix chicken lol.... If you can't ask the person they came from - I might just be happy with 3 pretty mixes & then just get a couple later that you DO know what they are. I hatched some eggs out last year from my own birds and I still find it hard - even though I own all the parents - guessing what the mix is!!
(I know I got a couple hamburg mixes out of my hatch - and they all have TONS of personality! But my silver spangled hamburg mixes are either black or have some spangling.... )