The coordinates of the point A is (3,5).
Explanation:
Here, given the line segment is AC.
Let us assume the coordinates of the point A = (p,q)
The point M (0,5.5) is the mid point of line segment AC.
By Mid-Point Formula:
The coordinates of the mid point M of segment AC is given as:

So, the coordinates of the point A is (3,5)