Students of Class \(9\) plan a robotics arena at a venue shaped like a coordinate plane. Start line is at \(S(2, 1)\), charging station is at \(C(7, 1)\), obstacle course is at \(O(12, 6)\), and data upload point is at \(D(7, 6)\)
(i) What shape is formed by the locations of all four spots?
(ii) What is the distance between charging station and data upload point?
(iii) Which point is farthest from the origin?
(iv) Which point lies on the \(y-axis\)?