\((i)\) From \(0\) to \(2 \,s\) the velocity \(=0\) as displacement is zero.
\((ii)\) From \(2\) to \(5 \,s\) velocity is decreasing but nature is positive, but acceleration is negative.
So, \(v\) and \(a\) have opposite nature.
$OA, \,AB,\, BC,\, CD$