What should be the staggered position on a four lane highway?

• The lead rider should ride in the right lane position while the second rider stays one second behind in the left lane position
• A third rider maintains the right position two seconds behind the leader and so on for the other riders
• Both a and b
  Explanation:

  "For a four lane highway, the lead rider should ride in the right lane position while the second rider stays one second behind in the left lane position. A third rider maintains the right position two seconds behind the leader and so on for the other riders."
• None of the above