My uneducated guess might be Korean or Filipino... only because my stepbrother is Filipino and he has large lips too. but I have no idea honestly. I;m bad with ethnicities.

As far as saving 4... You could use it for "sexier" roles..
But honestly your energy is so much better with 5... as well as your sex appeal. It has a beauty and a vibrancy to it that shows how lovely you are...
4 is just cheesy, but that's just my opinion.

I'd guess Filipino.

I think they all look good -- finally a photographer who knows what he's doing.

The pink top with necklace is a bit much -- I'd keep it as a backup character shot when submitting specifically for party girl roles, but not as a main shot.

Age range, I'd put you in high school through college category.