Answer: Not totally certain if you have any multiple choice answers or anything but here's a general idea of what I would write in response.
Explanation: First step is always going to be asking them if they're okay, the question says they're unresponsive so you want to access the situation. If they are spasming and signs lead to them having a seizure your going to immediately call for an ambulance, don't try to restrain them unless they are potentially going to hurt themselves ie. falling off of something or hitting something dangerous nearby. Restraining them can potentially damage their nerves and muscles more than just letting them flail.
If they don't seem to be having any signs of a seizure then you want to check if they're breathing. If they aren't you need to start performing cpr. Have someone nearby call an ambulance or call 911 and ask for walk-through steps if you aren't certified, that way you know what your doing and you can have that support you if they try to sue you (which won't be a problem because of the good samaritan law anyways) You want to get them laying on their back, tilt their head and make sure nothings restricting their air flow. Then your going to do a couple breaths, if they don't start breathing you'll begin compressions. Compressions, breath, compressions breath. I reccommend looking up appropriate compression techniques for different age people and how to correctly administer if you aren't already aware since I don't want to write a whole article here- I hope this helped!
In general the outermost layer of many stuctures is named similarly e.g. perineurium = outermost layer of nerves, perimysium = outermost layer of muscle, etc.
