In a patient with suspected acute appendicitis, where is McBurney's point located?
1) Midway between the umbilicus and the left anterior superior iliac spine
2) Midway between the umbilicus and the right anterior superior iliac spine
3) Two-thirds of the way from the umbilicus to the left anterior superior iliac spine
4) Two-thirds of the way from the umbilicus to the right anterior superior iliac spine
5) Two-thirds of the way from the right anterior superior iliac spine to the umbilicus