Who created the original British version of 'The Office'?

Who played Michael Scott in 'The Office' (U.S.)? 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? In which city is 'Seinfeld' set? 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?