Who played John "Bluto" Blutarsky in 'Animal House'?

In which film is Gertie a character? Who played Carl Spackler in 'Caddyshack'? In which film is Carl Spackler a character? Who played Ty Webb in 'Caddyshack'? In which film is John "Bluto" Blutarsky a character? Who played Jake Blues in 'The Blues Brothers'? In which film is Jake Blues a character? Who played Elwood Blues in 'The Blues Brothers'?