Misc: In 1917 ---------- the Cat, cartoon character, born. ?

Questions

What was the name of the guy who couldn't enunciate on "The Fat Albert Show"?

What was the name of the hollow hole-covered plastic ball kids used to hit instead of a baseball?

What German siren sang "99 Luftballons" (known in the US as "99 Red Balloons")?

What group sang "Come On Eileen"?

What speed did Marty have to reach in order to activate the flux capacitor?