Three delivery drones are currently located at the points D1(−1.5,2), D2(4,−3) and D3(0,1.8) on a coordinate grid.
(i) Arrange the drones in order of increasing horizontal distance from the y-axis. Explain your method clearly.
(ii) Which drone is positioned farthest south? Support your answer with a comparison of ordinates.
(iii) Drone D2 must move so that it shares the same ordinate as D1 while keeping its abscissa unchanged. Write the new coordinates of D2 and state whether this point lies above or below the x-axis.