(a(i))[2]
With $1\text{ cm}$ representing 8 km, plot the position of town $S$.
(a(ii))[3]
Calculate the time at which she reaches $S$.
(b)[2]
Work out the scale Jai uses, and give your answer in the form $1:n$.
(c(i))[2]
Show that angle $XYZ$ is $90^{\circ}$.
(c(ii))[2]
Calculate $XZ$.