Congratulations on having a proven brooding hen! The rest of the eggs should hatch within the next couple of days and if she tosses an egg out of the nest don't bother putting that one back in; mother nature does know best. You can expect that she will stay on the clutch for the next day or two as well, and don't worry about them babies eating; just put food and water down where momma usually eats, she'll take them to the food and water when it's time. They spent time in their shell immediately prior to hatching absorbing the highly nutritious egg yolk; enough calories there to hold them babies over for two or three days. Don't worry about her taking the little ones out on walks either, she'll take them out when she feels it's safe, and give them all sorts of life lessons and then she'll cover them with her body to warm them frequently.
Again, congratulations! I wish I had a broody hen. I'm so jealous!