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

A small sphere, carrying charge $q$, is hanging between two parallel plates by a string of length $L$. Time period of pendulum is $T_0$. When parallel plates are charged, the time period changes to $T.$ The ratio $\frac{T}{T_0}$ is equal to,

The springs shown in the figure are all up stretched in the beginning when a man starts pulling the block. The man exerts a constant force $F$ on the block.

The displacement versus time curve for a particle executing SHM is shown in figure. Choose the correct statement(s).

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,