A spring stretches by \( 2 \, \text{mm} \) when it is loaded with a mass of \( 200 \, \text{g} \). From equilibrium position of the mass is further pulled down by \( 2 \, \text{mm} \) and released. The frequency associated with the system and maximum energy in the spring are ______ \( \text{Hz} \) and ______ \( \text{J} \), respectively.
