there is no exact answer because it will depend on muscle mass, bone structure, etc...
175lbs - is probably too much
105lbs is probably too little
Averages Ive seen are 100lbs for being 5 feet, and between 5 -10 lbs for each inch over that -
so for 5'2 anywhere between 110 - 120 but that's just a guess...
It's where you feel comfortable.