(a(i))[1]
Find, in terms of $T$, an expression for the train's retardation.
(a(ii))[1]
Find the train's speed when $t = \frac{3}{4}T$.
(b(i))[1]
The train covers $150\text{ m}$ between $t = 0$ and $t = T$. Find $T$.
(b(ii))[1]
On the diagram, sketch the train's distance-time graph.