(a(i))[1]
Construct the locus of points within quadrilateral $PQRS$ that are $6\text{ cm}$ away from $S$.
(a(ii))[2]
Construct the locus of points within quadrilateral $PQRS$ that are equally distant from $QP$ and $QR$.
(b)[1]
Shade the region inside quadrilateral $PQRS$ that contains points more than $6\text{ cm}$ from $S$ and nearer to $QR$ than to $QP$.