Answer the following questions related to the Cartesian plane.
(i) Define (a) abscissa and (b) ordinate of a point.
(ii) State the names of the four quadrants in anticlockwise order starting from the upper-right region.
(iii) The points P(3, –5), Q(–4, 2), R(0, –6), S(–7, 0) and T(1, 4) are given. For each point, state whether it lies in Quadrant I, II, III, IV, on the x-axis, on the y-axis or at the origin.