What height will i reach at aged 20?

Question

i am 15 and 3months, i measure 5ft 8.2" (173cm) and i am in the middle of my first growth spurt. You could say i am a late bloomer. I have grown gradually before this.

aged 12- 5ft 1

13- 5ft 3

14- 5ft 5

15- 5ft 8 and a bit

Answer 1

It's difficult to say

maybe you'll reach 180 cm or less

Answer 2

i reckon you will reach 6ft or 6ft 1in at age 20