One endpoint of a line segment has coordinates represented by $(x+6,\frac{1}{3}y).$ The midpoint of the line segment is $(2,-5).$ How are the coordinates of the other endpoint expressed in terms of $x$ and $y?$

$(-2-x,-\frac{1}{3}y)$

$(10-x,-\frac{1}{3}y)$

$(2-x,-10+\frac{1}{3}y)$

$(-2-x,-10-\frac{1}{3}y)$