A rope has points at 0.5, 1, 1.5 and 2.5 m, and a wave of wave number $\pi$ rad/m is drawn at t = 0. What does this code print? import numpy as np; x = np.array([0.5, 1, 1.5, 2.5]); print(np.round(np.sin(np.pi * x), 2))