Color rendition in photos is not always accurate. I will guess based upon what I see on my monitor.
#1 Black Australorp,
#2 Gold Sex Link. If is if darked red than the photo shows it could be a RIR. I had a couple with these types of markings but they were darker than your photo. One thing I notice about this one is that it legs look pretty beefy for it's age. Sometimes a sign of a possible rooster. It is still WAY to soon to know though.
#3 no guess that I could trust... IF the color is almost white and the wing feathers are close to black, maybe a Delaware or Columbian Wyandott??? I may be way off on this one.
I notice that #3 has a bit of a dirty bottom. It is very important to prevent poppy butt. They can die from it. You need to clean this one right away. I recommend checking the others while you are at it. Yuo should check each of them at least a couple of times a day. You can find lots of info about this on other threads in this forum.