A vertical sprng with spring stiffness constant 305N/m vibrates with an amplitude of 28.0cm when 0.260kg hangs from it. The mass passes through the equilibrium point(y=0) with positive velocity at t=0 a) What equation describes this motion as a function of time? b) At what times will the spring have its maximum and minimum extensions?

https://www.askmehelpdesk.com/other-subjects/announcement-u-b-read-first-expectations-homework-help-board-b-u.html

A vertical sprng with spring stiffness constant 305N/m vibrates with an amplitude of 28.0cm when 0.260kg hangs from it. The mass passes through the equilibrium point(y=0) with positive velocity at t=0 a) What equation describes this motion as a function of time? b) At what times will the spring have its maximum and minimum extentions?
Ccc