Students of Class \((9)\) plan a warehouse inventory system shaped like a coordinate plane. Loading dock is at \(L(0, 0)\), Shelf A is at \(S_A(8, 0)\), Shelf B is at \(S_B(8, 7)\), and Quality Control is at \(Q(0, 7)\) and at \(R(0,-7)\).
(i) Which lies on the \(y-axis\)?
(ii) What is the quadrant of \((8,7)\)?
(iii) What is the distance between the Shelf A and Quality Control Q:?
(iv) Which is equidistant from the origin?