Which 1968 Marvin Gaye hit is about learning from others that his lover is leaving him?

In which 1968 film does a computer say "I'm sorry, Dave. I'm afraid I can't do that"? In which 1968 film does John Wayne lead a U.S. Special Forces unit in Vietnam? Katharine Hepburn won an Oscar in 1968 for playing which medieval queen in "The Lion in Winter"? Which 1968 Rolling Stones hit title could be paraphrased as "Leapin' knave lightburst"? Who won the 1968 Olympic gold medal in heavyweight boxing? In which 1968 film does Steve McQueen play a millionaire who pulls off the perfect bank robbery? Which 1968 Broadway musical used songs like "Yankee Doodle Dandy", "Harrigan" and "45 Minutes from Broadway"? Which Pulitzer-winning 1968 William Styron novel is narrated by the leader of an 1831 slave rebellion?