(a(i))[2]
Construct the perpendicular bisector of $AB$.
(a(ii))[2]
Construct the locus of points that are equidistant from $FA$ and $FE$.
(b)[3]
Shade the region inside the shape that is more than $5\ \text{cm}$ from $D$ and less than $4\ \text{cm}$ from $C$.