Answer:
Ella <em><u>tiene</u></em> 15 años.
Explanation:
Translation: She is 15 years old.
Hope this helped! :)
No need to worry her are the answers
For the I it’s yo
For the we it’s ellos ellas
For the he and she it’s el, Ella
For the they you it’s nosotros, Nosotras
Because Carlos is a masculine name, I would use the word <em>el </em> to talk about him.