Answer:
2. Instruct a bystander to contact emergency services or call them yourself and place them on speaker
3. Check for injuries
4. If possible and safe to do so, practice a head-locked roll
6. Begin chest compressions
Explanation:
This is based on some old training that I had and this guide from the Red Cross :https://www.redcross.org.uk/first-aid/learn-first-aid/unresponsive-and-not-breathing