Body Hair Growth

Ok as some of you know, I am 16, and as many boys my age body hair is something I do not perticularly like. Anyway I just have a question or a few questions. My first would be revolving around the pattern and amount of hair that grows on the body

i know genetics plays a huge role in the amount of body hair one grows, and the pattern, and as you age I know it getting darker and more appears but My question is how would you tell what your pattern is, I have hair pretty much everywhere, and yes I know vellus hair is EVERYWHERE but yea lol.
i have hair on my chest, stomach, lower back, buttox, legs, top of my foot. and my question is how would I tell if this is my final pattern?, as in what could I do to predict if I would get more or not, I have hair that spreds on a good part of my stomach, chest and its odd to me because most boys my age which I have seen dont have as much hair as I do, is there a changce that this is all i would get in the sense that the pattern I have now will stay like that because i pretty much have the body appearance of an 18 - 30 year old… and i`m 16 so is it possible that i have reached my adult body growth at the age of 16? and lastly though hair grows more as you age, how much exactly lol? as in is it alot or not?