Q.A velocity-time graph (a plotted curve, not reproducible as text, with the $t$-axis marked from 0 to 7 s and the $v$-axis marked from about $-2$ to 2 m s$^{-1}$) represents a particle moving in the positive $x$-direction. Analyse its motion from 0 s to 7 s. Calculate the displacement covered and the distance travelled by the particle from 0 s to 2 s.