## College Physics (4th Edition)

The correct answer is: (e) $0~s, 4~s, 8~s$
When an object is in SHM, the sum of the kinetic energy and potential energy is constant. The potential energy is maximum when the kinetic energy is minimum, which occurs when $v_x = 0$. The potential energy is maximum at $t = 0~s, 4~s, 8~s$ The correct answer is: (e) $0~s, 4~s, 8~s$