In 1977 Richard Nixon told David Frost, "When the president does it, that means that it is not..." what?

In which 1977 film does a hologram plead "Help me, Obi-Wan Kenobi. You're my only hope"? In which 1977 film does C-3PO advise "I suggest a new strategy, R2: let the Wookiee win"? In which 1977 film does John Travolta strike a pose on the dance floor, pointing his finger to the sky? Who released the Grammy-winning comedy album "Let's Get Small" in 1977? Richard Dreyfuss won the Best Actor Oscar for which 1977 film co-starring Marsha Mason? In which 1977 film does Princess Leia tell her rescuer "You came in that thing? You're braver than I thought"? In which 1977 film does a woman tell her boyfriend "You only gave me books with the word 'death' in the title"? "Calcium Light Night" (1977) was the first ballet choreographed by which Danish dancer, later ballet master in chief of…