Let’s get down to business. Can you name: The paper Carrie wrote for? The art gallery Charlotte worked for? Samantha’s PR agency? Miranda’s law firm? If so, you just might have what it takes to win the News & Observer’s “Sex and the City” trivia contest. The winner, selected at random from entries with the most correct answers, will receive the 20-DVD set, “Sex and the City: The Complete Series,” which includes all 94 episodes from the show’s six season run.