Kinematics of motion in a straight line — practice question

A car moves on a straight road with constant acceleration $a\,\mathrm{m\,s^{-2}}$, where $a>0$. The car goes through the points $A$, $B$ and $C$ in that order. At $A$, the car has speed $u\,\mathrm{m\,s^{-1}}$ in the direction $AB$. The distance $BC$ is twice the distance $AB$. The car takes $8$ seconds to go from $A$ to $B$ and $10$ seconds to go from $B$ to $C$.