We don't give homework answers, but we do enjoy guiding students.
Searching "12 labors of Hercules" yielded several sites. This one gave a clear summary.
http://www.shmoop.com/heracles-hercules-12-labors/summary.html
Searching "Hercules myth summary" brought up many sites too. Edith Hamilton is respected in the field.
http://www.gradesaver.com/mythology/study-guide/summary-hercules-atalanta