I agree that the redish/goldish ones are likely Gold Sex Links.
The white one look larger than the others. If they are and they are the same age than I doubt that they are Leghorns. Leghorns are a little smaller than GSL. The feathering looks a little different than my leghorns. From the picture it does not look like they are a pure white. Leghorns should be a pure white. I don't think these are leghorns.