A particle starts from rest at $t = 0$ and moves along a straight line. Its acceleration changes with time as shown in the graph: $4\ \text{m/s}^2$ for the first $2\ \text{s}$, zero for the next $2\ \text{s}$, and $-2\ \text{m/s}^2$ for the $2\ \text{s}$ after that. At $t = 6\ \text{s}$, the velocity of the particle and the distance it has covered since $t = 0$ are

Fig. 1: Acceleration-time graph: 4 m/s squared from 0 to 2 s, zero from 2 to 4 s, and -2 m/s squared from 4 to 6 s.