How much sould a 11 year old weigh if their height is 5 foot?

you know all you need to help go on a strike because the schools send out those letters to parents but they give it to us kids and a kid can't get something without looking at it well i can't and on it it has a meter and a note telling if your child is over weight or not and they keep saying i am over wiegh and it doesn't make me feel good and i hate telling my weigh but i want an answer for my question it was how much should a 11 year old wiegh if they are 5 feet tall because i weigh 111 pounds :(