Barbara employed Dwain and Robert to teach her to sky dive. Before her first jump, she signed an agreement releasing the instructors from all claims for personal injury resulting from parachuting and related activities. She made her first parachute jump with instructor Dwain and pilot Robert. During a difficult landing some distance from the target, Barbara suffered back, arm, and leg injuries. Barbara sued on a negligence theory, and the defendants argued that they were not liable because of the release. Does this release protect the defendants from liability? Explain.