In a game of lawn chess, where pieces are moved between the centers of squares that are each 1.61 m on edge, a knight is moved in the following way: (1) two squares forward, one square rightward; (2) two squares leftward, one square forward; (3) two squares forward, one square leftward. What are (a) the magnitude and (b) the angle (relative to "forward", "left of forward" is the positive direction) of the knight's overall displacement for the series of three moves?