A 2kg mass is attached to a spring with spring constant 8 N/m. The mass is pushed to the left and released (t=0 seconds). At t= 3r/4 seconds, the mass is moving to the left with a speed of 0.4 m/s. a) Find an equation for the position as a function of time. (Hint: What is the period? What is the amplitude? What function best describes the position?) b) Find equations for the velocity and the acceleration of the mass. c) What is the maximum force experienced by the mass?