A tour bus has overturned, resulting in numerous patients. When you arrive, you are immediately assigned to assist in the triage process. Patient 1 is a middle-aged male with respiratory distress, chest pain, and a closed deformity to his right forearm. Patient 2 is a young female who is conscious and alert, but has bilateral femur fractures and numerous abrasions to her arms and face. Patient 3 is an older woman who complains of abdominal pain and has a history of cardiovascular disease. Patient 4 is unresponsive, is not breathing, has a weak carotid pulse, and has a grossly deformed skull. What triage categories should you assign to these patients?