If a particle is executing simple harmonic motion, then acceleration of particle

For a particle executing simple harmonic motion, the acceleration is -

For a particle executing simple harmonic motion, the acceleration is proportional to

For a particle executing simple harmonic motion, the acceleration is proportional to

For a particle executing simple harmonic motion, the acceleration is proportional to

For a particle executing simple harmonic motion, the acceleration is proportional to

Obtain the formulae for displacement, velocity, acceleration and time period of a particle executing simple harmonic motion. When is the velocity of particle maximum and when zero ? Acceleration ?