Solution:
(a) Firstly, we plot the points of the line segment on the paper and join them.
We know that, the perpendicular bisector of the line segment AB bisect the segment AB, i.e.,perpendicular bisector of line segment AB passes through the mid-point of AB.
Now, we draw a straight line on paper passes through the mid-point P. We see that the
perpendicular bisector cuts the Y-axis at the point (0,13).
Hence, the required point is (0,13).