1) This isn't the BF4 subreddit, so odds are good you won't get a reply past mine.
2) https://repl.it/BaLJ/148: Use this. Start at the top, replace with the correct numbers, and work your way down the list. When you're finished, run the script and it'll give you the order you need to get to the Morse.
3) Go redo your search in the correct subreddit, there's a plethora of information there.
Can't go wrong with these sound quality is amazing. Not to mention the design is pretty God damn sweet👍