Mark the following points on a sheet of a paper. Tell how many line segments can be obtained in each case?

Any five points so that no three of them are collinear.

In the below figure, name the four pairs of lines.

In the adjoining figure, name:  Four collinear points.

In the adjoining figure, name:  Three non-collinear points.
 

In the given figure, name: Three concurrent lines.

In the given figure, name: Three lines whose point of intersection is $P$.