I don't have any photos, but we use a shower😂 We cover the drain with cardboard and build cardboard walls, then fill it with shavings and put in our heat lamp, feeder, and waterer
It depends on your hen. Sometimes your hen will accept the babies and sometimes they won't. We had a hen that only hatched one baby, so we tried to add more, but she did not want them and was perfectly fine with the one she had. I think you could try putting the chicks in with your hen, and if...
The first are definitely female red sex links. We have a few around the same age as yours and the look the exact same;). The 4th one looks like a male speckled Sussex. I do not know what the last one is... we have never had any breeds that have looked like that before.