A system consists of a 2.0-kg mass hanging from a vertical spring that has a spring constant of 8.0 N/m. The system is displaced 20.0 cm and continues to vibrate with no damping. -Determine the amplitude, and calculate the period and frequency of the oscillation. -Write an equation for the displacement (in centimeters) of the mass as a function of time. -Sketch two oscillations of the displacement versus time graph. -Calculate the maximum values of spring force, acceleration, and velocity of the mass. -During one full oscillation, explain when the points of maximum acceleration and maximum velocity occur.