4. You arrive on scene with your partner Elija to a multiple vehicle accident where you are the 2nd ambulance to arrive. Scene size up indicates there are 7 patients in 3 cars all requiring extrication. In the first car is a 27 year old woman who is 32 weeks pregnant, conscious, and crying, a 12 year old girl who is screaming and complaining of back pain, and an 8 year old boy who has a facial laceration and open fracture of the tibia who is also conscious but breathing very shallow. In the second car is an 86 year old man who is slumped against the steering wheel with no pulse and has a piece of metal impaled through his head. In the third car are 3 teenagers 17 years of age. The two in the front seat are complaining of neck pain and appear to have an altered level of consciousness. Neither of them were wearing a seatbelt and both have contusions on their foreheads. In the back seat is the last occupant, a girl who said she was having a seizure and vomiting earlier so her friends were taking her to the hospital. She was wearing her seat belt and has no sign of injury. Who should be receiving treatment first?