$$\(7 \quad P, Q\)$$ and $$\(R\)$$ are three points marked on a grid. (a) Write down the coordinates of point $$\(Q\)$$. (1) $$\(S\)$$ is the point such that $$\(P Q R S\)$$ is a rectangle. (b) Find the coordinates of point $$\(S\)$$. (1) (c) Find the coordinates of the midpoint of $$\(P R\)$$. (2)

Answer:

Knowledge points:

Solution: