A 34-year-old male presents to the ED complaining of shortness of breath and ‘heaviness in chest’ for the last 3 hours. Patient denies any past medical history, but endorses routine methamphetamine use and 1 pack per day smoker. Vital signs BP 154/90, HR 102, RR 20, SPO2 93%. Patient rates his pain a 5/10. What is this patient’s ESI level?