It’s the first one.
Van and vamos
The jury looks over facts from the case and decides if the defendant is guilty or not. The judge ultimately makes the decision though using evidence presented by the juries
It kind of depends on the teacher.
Yes you should worry about this semesters grades. It depends on your school system honestly. And you shouldn’t have to worry if you know you have all your credits for your classes. You should speak with your guidance counselor