Answer
(a) $(-6,-1)$
(b) $(6,1)$
(c) $ (6,-1)$
Work Step by Step
(a) A point symmetric with respect to the x-axis means $(x,y)\to (x,-y)$, thus $(-6,1)\to (-6,-1)$
(b) A point symmetric with respect to the y-axis means $(x,y)\to (-x,y)$, thus $(-6,1)\to (6,1)$
(c) A point symmetric with respect to the origin means $(x,y)\to (-x,-y)$, thus $(-6,1)\to (6,-1)$