(a)[3]
Show that $\angle BAC = 44.0^{\circ}$, to 1 decimal place.
(b)[1]
Calculate the bearing of $A$ from $C$.
(c)[4]
Farms $A$ and $B$ are linked by the straight track $AB$. Amira walks along the track from $A$ at a steady speed of $4.6\,\text{km/h}$. Calculate the time needed for Amira to walk from $A$ to the point nearest to farm $C$. Give your answer in minutes and seconds, correct to the nearest second.
(d)[4]
A helicopter is positioned vertically above farm $B$. The angle of elevation to the helicopter from farm $A$ is $10.7^{\circ}$. Calculate the angle of elevation of the helicopter from farm $C$.