The ordinate of all points on the $x$-axis is:

The distance of the point $(7,0)$ from the origin is $\ldots \ldots$

From the given figure,answer the following:
$(i)$ Write the points whose abscissa is $0.$
$(ii)$ Write the points whose ordinate is $0.$
$(iii)$ Write the points whose abscissa is $-5.$

The point $\left(-\frac{7}{2}, \frac{5}{2}\right)$ lies in the $\ldots \ldots \ldots$ quadrant.

In the Cartesian plane,the vertical line passing through the origin is called the.......

If $P(-1, 1)$,$Q(3, -4)$,$R(1, -1)$,$S(-2, -3)$,and $T(-4, 4)$ are plotted on the graph paper,then the points in the fourth quadrant are: