One of the largest species of trantulas is the Brazilian Giant Tawny Red. A tarantula has two body parts. The anterior part of the body is covered above by a shell, or carapace. From a recent article, we find that the carapace length of that adult male G. mollicoma is normally distributed with mean 18.14mm and standard deviation 1.76mm.
Determine and interpret the quartiles for carapace length of the adult male G. mollicoma.