"Solitary Man" was the first hit for which singer-songwriter?

In which 1970 film does the title character say "No bastard ever won a war by dying for his country"? Which 1970 film introduced the line "Love means never having to say you're sorry"? Which 1970 Jackson 5 No. 1 hit warns "Stop! ... may be your own"? In which 1970 film does Rod Steiger play Napoleon in his last battle? Which 1970 hit's title could describe a "structure spanning agitated H2O"? T. Harry Williams won a 1970 Pulitzer Prize for his biography of which Louisiana "Kingfish"? Complete the title of Ursula K. Le Guin's novel: "The Left Hand of ___". "(They Long to Be) Close to You" was a 1970 hit for which brother-sister duo?