At age 12, any amount is okay. You will grow a lot more over the next decade or so; if you are "below average" now, you will catch up. If you were "ahead" then you won't grow as much later on.
Normally, an 11 year old boy is not supposed to have facial hair quite yet. If you do, I would just use mens' facial hair products.
Yes. It's part of puberty
no. at this point if you are still alive you should have lost all hair on your body. you should be hairless at 145 years old.
An eleven year old boy should have 2,300 mg a day
There really is no specific limit to how much a fourteen year old boy should weigh. It depends on how tall you are, because if you were 5' 9", you should weigh more than a fourteen year old boy who is 5' 2".
279 - 280
70lbs. About.
you should know.
140
120-140
1 hour
9st