A spring with spring constant k has a mass on one end, with the other end attach

Question

A spring with spring constant k has a mass on one end, with the other end attached to the wall. The mass is initially at rest on a horizontal frictionless surface at a location we will call x = 0. Your partner grabs the mass and pulls it out to x = L. She then lets the mass go, causing the system to oscillate. Which of the following are true? More than one answer may be correct. Use the normal assumptions when working this problem.
When the mass is at x = L (or -L), its kinetic energy is zero.
When the mass is at x = L (or -L), its kinetic energy is at its maximum.
When the mass is at x = 0, the elastic potential energy is zero.
The total energy is at a maximum for some location x = D between x = L and x = -L (but not x = 0).
The total energy is larger than at any other point when the mass is at x = 0.
When the mass is at x = 0, the elastic potential energy is at a maximum.
The total energy is constant regardless of the location of the mass.
The total energy is at a maximum when the mass is at x = L, but not at -L.

Explanation / Answer

following are true: 1.)When the mass is at x = L (or -L), its kinetic energy is zero.,,,,,,,,,,,,,,,,,,, 2.)When the mass is at x = 0, the elastic potential energy is zero.,,,,,,,,,,, 3.)The total energy is constant regardless of the location of the mass

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