Misc: Who wrote the opera La Traviata?

Questions

In 1986 which Woody Allen film won Oscars for Best Supporting Actor and Best Supporting Actress, as well as for Best Original Screenplay?

On which motorway are the Trowell and Woodhall service areas?

What name did Octavius adopt on becoming the first Roman Emperor in 27 B.C.?

With which 19th century plot was Arthur Thistlewood associated?

Alphabetically speaking, which is the last of the 26 Irish counties. Most people say Wexford, but they're wrong?