Which classic 1950 film includes the line "All right, Mr. DeMille, I'm ready for my close-up"?

Clark Gable's short but happy marriage to which actress ended with her death in a 1942 plane crash? What is the weight class of a pro boxer whose top weight is 160 pounds? To which class of instruments does the flute belong? Which 1930 gangster film ends with the line "Mother of mercy, is this the end of Rico?" Which classic comedy routine is associated with Bud Abbott and Lou Costello? Claude Bessy long directed the ballet school of which European capital's opera? Claude Brown's 1965 autobiographical book about growing up in Harlem is "Manchild in" what? Claude Rains beats Lon Chaney Jr. to death with a silver walking stick in which 1941 film?