When a group of riders is traveling on a multi-lane highway, how should they execute a lane change as a group?

1. All riders should merge simultaneously as a single block
2. The lead rider moves first, followed sequentially by each rider in the group
3. The sweep (tail) rider should move first to secure the lane, followed by the others in reverse order, or the leader coordinates the move after the sweep rider blocks the lane
4. The fastest riders should change lanes first and wait for the others