What is the function x(t) that describes the object's position for the following graph? 10 8 6 4 2 x (cm) 0 t (s) 2 -2 6 8 10 12 -4 -6 8 -10x(t)=(8.0 cm) cos(1/8 t+nt/3) O x(t)=(4.0 cm) cos(1/8 t+n/3) O x(t)=(8.0 cm) cos(t/4 t-It/3) O x(t)=(8.0 cm) cos(nt/4 t+n/3) O x(t)=(4.0 cm) cos(nt/4 t-It/3)