Two Mepham High School seniors recently signed their letters of intent to play college sports at the C.W. Post campus of Long Island University, which has a Division II athletics program. They are 18-year-old Nicole Stackpole, who is a star on the Mepham girls’ lacrosse team and who was recruited to play attack for Post, and 17-year-old Joseph Aliberti, a member of the Mepham football team who was recruited for Post’s offensive line.