1ass weighing 20 pounds stretches a spring 6 inches. The mass is initially released from rest from a point 6 inches below the equilibrium position. (a) Find the position x of the mass at the times t = 71/12, 71/8, 11/6, 11/4, and 911/32 5. (Use 9 = 32 We2 for the acceleration clue to gravity.) xvii/12) = ft X(11/8) = ft X(rr/6) = ft X(71/4) = ft X(911/32) = ft (b) What is the velocity of the mass when t = 311/16 s? Ft/s In which direction is the mass heading at this instant? O upward O downward (c) At what times does the mass pass through the equilibrium position? ,n=0,1,2