tv/ movies: The Hollywood walk of fame star was awarded to "bill conti" for _____?

Questions

Grease: This was the rival gang of the T-Birds.?

Hank azaria (simpon voices) was the camera man for what movie?

Hanna barbera rose to fame by creating what duo for mgm?

Happy days: joanie's first date was with one of fonzie's cousins. What was his name?

He played himself in "Rage In Harlem" and acted in "Down By Law"?