\textbf{172.} In the figure below, the surface of the spring is frictionless. The weight is pulled 3cm in the direction of the x-axis from the equilibrium position and released so that it performs simple harmonic motion. In the first half second, what is the distance traveled by the oscillator? $(\pi = \sqrt{10})$
\begin{center}
$k = 50\,\dfrac{\text{N}}{\text{m}}$ \hspace{2cm} $m = 200\,\text{g}$
\textit{[Figure: mass-spring system on frictionless horizontal surface with x-axis]}
\end{center}
\begin{itemize}
\item[(1)] 5
\item[(2)] 3
\item[(3)] 2.5
\item[(4)] 1.5
\end{itemize}