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$ {\overline{AB}} $ lies in the x-y coordinate plane, and point M is the midpoint of $ {\overline{AB}} $.

If point A is at $(3,-4)$ and point M is at $(-1,6)$, what are the coordinates of point B?

$(-8,-20)$

$(-5,16)$

$(1,-1)$

$(2,-5)$

$(7,-14)$