. A mass-spring system is going under simple harmonic motion on a frictionless surface. The left end of the spring is tied to a wall, which is at the origin and the right end is attached to a 321-gr mass. The spring constant k is equal to 120 N/m. When the mass is at x = 25 cm the elastic potential energy of the spring is zero. At x = 15 cm and x = 35 cm, the kinetic energy of the mass is equal to zero. Find (a) the amplitude, (b) frequency, (c) period, (d) angular frequency, (e) maximum speed (f) the value of x when the kinetic energy of the mass is equal to the elastic potential energy in the spring.

\f