Verb conjugation of "stoßen" in German

Everyone says, that I am sending always silly pictures, so here 4 more images. Your picture is very cool, especially the hat, it has a really cool shape. Are there different sizes?
My correction were added and highlighted with yellow markers and attached to this email. Tell me now if you have any questions about grammar rules, since I was a teacher 10 years ago.
My Spanish is weak, and I need to improve it here. But it is very difficult because I have many other things to do. I must take care of my family and my friends and have no time for Spanish.