Final answer:
In this scenario, the first action should be to apply the AED.
Step-by-step explanation:
In this scenario, your first action should be to apply the AED. An AED, or Automated External Defibrillator, is a portable device that delivers an electric shock to the heart to help it re-establish an effective rhythm. AEDs are designed to be used by laypersons and can greatly increase the chances of survival in cardiac arrest cases. While CPR is important, the use of the AED should take precedence as it can potentially restore the patient's heart rhythm.