Three points are described below, each starting from the origin:
• Point P: Move 4 units to the left and then 2.5 units upward.
• Point Q: Move 1.5 units to the right and 3 units downward.
• Point R: Move 2 units to the left and 4 units downward.
(i) Write the coordinates of P, Q and R.
(ii) Plot the three points on the Cartesian plane.
(iii) For each point, state whether it lies in Quadrant I, II, III, IV, or on an axis, giving reasons in each case.