You decide to open a ski school because you are an excellent skier? Because you realize that skiing can cause injuries, you require all participants to sign a form that releases all liability from your ski school. One of your students reaches the bottom of of a steep hill and collides into a snowmobile that one of your instructors left parked in the ski path. Your student sues you and your defense is the form you had the student sign. Interpret the type of agreement that was signed by the student. Explain why the agreement will or will not be upheld in court.