A mass which is resting on a horizontal frictionless surface is connected to a fixed spring. The mass is displaced 0.16 m from its equilibrium position and released. At t = 0.50 s, the mass is 0.08 m from its equilibrium position (and has not passed through it yet). What is the period of oscillation of the mass? I know I am suppose to put what I have done so far but I have given up with the trying. Could somebody please give me some guidance and explain please. Thank you!