Who had a 1979 No. 1 hit with "Hot Stuff"?

What was the numerical title of the 1979 Blake Edwards comedy starring Dudley Moore and Bo Derek? In which 1979 film does Robert Duvall say "I love the smell of napalm in the morning"? Frank Langella played which title role on Broadway and in a 1979 film? Whose album "52nd Street" won the Grammy for Album of the Year? In which 1979 film does a father ask a court "what law is it that says a woman is a better parent simply by virtue of h… Kurt Russell played which "King" in a 1979 TV film directed by John Carpenter? Marlon Brando played which renegade officer in "Apocalypse Now" (1979)? Which duo had a late-1970s hit with a remake of Sam & Dave's "Soul Man"?