A mass less spring with spring constant 19 N/m hangs vertically. A body of mass 0.20 kg

Question:

A mass less spring with spring constant 19 N/m hangs vertically. A body of mass 0.20 kg is attached to its free end and then released. Assume that the spring was un-stretched before the body was released. Find
(a) How far below the initial position the body descends, and the
(b) Frequency and
(c) Amplitude of the resulting SHM.