How old are nick and marta in scat by carl hiaasen?

In the novel "Scat" by Carl Hiaasen, Nick and Marta are both high school students. Nick is around 14 years old, while Marta is a bit older, likely around 15 or 16 years old. Their exact ages are not explicitly stated in the book, but based on their grade level and typical ages of high school students, this estimation can be made.