Answer the following questions related to the Cartesian plane.
(i) Define (a) abscissa and (b) ordinate of a point.
(ii) Starting from the origin move 4 units to the right along the x–axis and then 3 units upward parallel to the y–axis to reach a point P. Write the coordinates of P.
(iii) A point Q is 5 units to the left of the y–axis and lies exactly on the x–axis. Write its coordinates and state on which axis it lies.
(iv) A point R has abscissa 0 and ordinate −6. Identify its position with respect to the axes and write the name of the axis on which it lies.