Which 1970 Jackson 5 No. 1 hit warns "Stop! ... may be your own"?

Who wrote the song "Bridge over Troubled Water" (1970)? Which group had a 1970 No. 1 hit with "I Want You Back"? 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"? In which 1970 film does Rod Steiger play Napoleon in his last battle? "Solitary Man" was the first hit for which singer-songwriter? 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"?