The mass-spring system shown in the figure above is set into motion by pulling the block to the right. When the block is released, the system oscillates in simple harmonic motion with a period of $T$.
The spring is replaced with a new spring that has triple the force constant of the original spring, and the block is replaced by a block with four times the mass of the original block. The new block is then pulled twice as far to the right.
What is the period of oscillation $T_2$ of the new configuration, when the block is released?