Misc: Of which people was William Tell a national hero?

Questions

Name The Vasolines cover Nirvana did, that is not on _Incesticide_.?

Name the very hip band: "Pieces of Eight" and "Grand Illusion"?

Name the Who's first big hit?

Name The Year: "9 to 5," "Bette Davis Eyes," and "Physical" hit #1 this year?

Name The Year: "At The Hop," "Tequila," and "The Chipmunk Song" all hit #1 this year?