Mexico is a part of North America [1]. What is less obvious is whether Guatemala, Belize, Nicaragua, etc, would fall into N or S America. Central America is a region, like the Middle East, but is not its own continent. Central America is a part of North America [2]. Nathan made a good point that the United Nations considers Mexico a part of Central America [3]. I wonder why [4].
Sear each side, flipping minimally. It should not take long for a crisp brown crust to form. Depending on the heat of your pan, it should take about 2-4 minutes (or less) for each side to finish cooking. When the first side is done, flip your steak and cook the second side for about as long.
Peek at the underside of the steak every 60 seconds or so until a nice row of grill marks appears. Note how long it took to get those grill marks on the timer/stopwatch. It should take three to six minutes depending on the heat of the grill. Rotate (not flip) the steak 45 degrees and allow the steak to sear for as long as it took to get the first set of grill marks. Now is the time to flip and repeat the process on the other side. Once the steak has cross-hatch grill marks on both sides, send it to the side with no heat.