Which of the following statements is/are true for a simple harmonic oscillator?

A particle starts from point $x=\frac{-\sqrt{3}}{2}A$ and move towards negative extreme as shown. If the time period of oscillation is $T$, then,

A simple pendulum of length $1 m$ is displaced by an angle $2°$ from its mean position and released from rest. It collides elastically with a wall which is inclined at an angle of $1°$ with vertical on other side of mean. Its time period (in sec) of motion is $\frac{x}{3}$, what is the value of $x$? (Take: $g={\pi }^2$)

Two blocks of mass $30 kg\&60 kg$ are connected to each other with springs in natural length on a smooth ground as shown in figure. An impulse is provided to both blocks in outward direction. The minimum time (in sec) after which the springs are in their maximum elongation position is $\frac{\pi }{n}$, what is the value of $n$?

Two simple pendulum made of small masses m each are pulled to side as shown and released. The collision is elastic. If the time (in sec) from the release will the left mass first reach point from where it was released is $T$, what is the value of $\frac{1}{T}$? Length of both strings is $1 \mathrm{m}$, take $\mathrm{g}={\pi }^2 \mathrm{m}/{\mathrm{s}}^2$.