Explanation:
If we have some point (x,y), and we are trying to find a point that is symmetric to the x axis, then the point will take in form of (x,-y)
If symmetric to y axis, (-x,y)
If symmetric to origin (-x,-y)
So the first answer is
(7,4)
The second answer is
(-7,-4)
The third answer is
(-7,4)