Who played Zack Morris in 'Saved by the Bell'?

In which TV series is Elaine Benes a main character? Who played Cosmo Kramer in 'Seinfeld'? Who played Newman in 'Seinfeld'? In which TV series is Newman a main character? Who played A.C. Slater in 'Saved by the Bell'? In which TV series is A.C. Slater a main character? Who played Kelly Kapowski in 'Saved by the Bell'? In which TV series is Kelly Kapowski a main character?