If you are 15 years old , and have a 3 inch penis and it is 7 inches when hard then it is quite normal.
1 inch soft, 9 hard
This is above average even for an adult male.
They have a hard penis...
depends if you're soft or hard anyway the regular size of a adult penis is 5-7 inches soft so you still have time to grow x)
This seems normal. Maybe a little on the small side. :)
Not at all.
It all depends on your age. This is average size for a preteen or boy that has not started Puberty.
There is no way to know. Some increase a lot and some don't. Very general average maybe half the soft length when hard, but that is very general. Some 3 inch grow to 8 and some 6 inch don't grow at all.
not at all
that is big