(a): Vectors and b define a 2D coordinate system shown in the right figure. What are the relative coordinates of Position A, B, and C, respectively? (b): In the right 2D Cartesian coordinate system, there is a mirror line m that is parallel to x axis and goes through Point A (1,1). To apply the corresponding reflection symmetry to Point B (2,2) can generate Point B', what is the coordinate of Point B'? 60 0 = (0,0) 60 09 0 = (0,0) 60 m A = (1,1) B 09 09 B=(2,2) b m 18