Question

If an object on a horizontal frictionless surface is attached to a spring, displaced, and then released, it will oscillate. If it is displaced a distance 0.130 m from its equilibrium position and released with zero initial speed. Then after a time 0.803 s its displacement is found to be a distance 0.130 m on the opposite side, and it has passed the equilibrium position once during this interval.

A- Find the amplitude.
B- Find the period.
C- Find the frequency .


Please any help ?