Markus takes right, where there is a raider with an SMG standing guard, Wu takes center where there is a stairs that goes downwards and to the right, a raider appears from those stairs once he hears the shooting upstairs. Ramses takes left, there is a female raider sleeping there with an assault rifle next to her.
None of the raiders will surrender even when caught off guard. They are normal humans and they can all die eve with a single will placed shot.
All actions happen almost simultaneously, only exception being the raider from the stairs that comes running two seconds delayed, but only Wu resolves taking him out.