In what year was Super Bowl X played?

Which team did the Pittsburgh Steelers defeat in Super Bowl X? Lynn Swann was named MVP of which Super Bowl? In which city was Super Bowl X played? Which head coach led the Pittsburgh Steelers to victory in Super Bowl X? Which team did the Oakland Raiders defeat in Super Bowl XI? Who was named MVP of Super Bowl XI? Fred Biletnikoff was named MVP of which Super Bowl? In which city was Super Bowl XI played?