\textbf{162-} If $m$, $V$, and $P$ are, respectively, the mass, speed, and momentum of an object, which relation represents the kinetic energy of that object?
$$\text{(1)}\ \frac{m \cdot V}{2P} \qquad \text{(2)}\ \frac{PV}{2m} \qquad \text{(3)}\ \frac{P^2}{2m} \qquad \text{(4)}\ \frac{mP^2}{2}$$