In which city is 'Seinfeld' set?

Who played Jim Halpert in 'The Office' (U.S.)? Which 'The Office' character runs a beet farm? Which 'The Office' character is the receptionist who marries Jim? Who created the original British version of 'The Office'? What is the name of the diner where the 'Seinfeld' characters often eat? What is Kramer's first name in 'Seinfeld'? Which 'Seinfeld' character is Jerry's nemesis and a mail carrier? Who co-created 'Seinfeld' with Jerry Seinfeld?