[tex]A(-6, -4), \ \ B (2, 2)\\\\S = (\frac{x_{a}+x_{B}}{2}, \ \frac{y_{A}+y_{B}}{2})\\\\S = (\frac{-6+2}{2}, \ \frac{-4+2}{2}) = (\frac{-4}{2}, \ \frac{-2}{2})\\\\S = (-2, -1)[/tex]
