During a school fete, five food stalls were set up at the following positions measured in metres from the school gate taken as the origin O: A(2.5, 1), B(–3, 4.5), C(–2, –1.5), D(4, –3) and E(0, –4).
(i) For each stall, determine in which quadrant or on which axis it is situated.
(ii) How many stalls are located in each quadrant? Present your answer in a simple table.
(iii) The teachers decide to add a new drinks stall F so that it lies exactly on the positive y-axis and is 3 metres above the origin. Write its coordinates and justify your answer.