If you have handed in an answer and you would like to change it, you can do that. You click the same button as you did when you handed in the answer, but now it says Change on the button. Make your changes and then hand it in again.
If you have handed in an answer and you would like to change it, you can do that. You click the same button as you did when you handed in the answer, but now it says Change on the button. Make your changes and then hand it in again.