Who directed 'It Happened One Night', the Best Picture winner for 1934?

In 'Dr. Strangelove', which actor plays three different roles? In 'Some Like It Hot', what instruments do Joe and Jerry play? In 'Sunset Boulevard', what is the name of the faded silent-film star? Which film won the Academy Award for Best Picture for 1934? Which film won the Academy Award for Best Picture for 1935? Who directed 'Mutiny on the Bounty', the Best Picture winner for 1935? Which film won the Academy Award for Best Picture for 1936? Who directed 'The Great Ziegfeld', the Best Picture winner for 1936?