Let ` be the line through the origin (0, 0) that is parallel to the vector ( √3 1 ) . Use matrix multiplication and your matrix from (a) to find the 2 × 2 matrix N that reflects v = ( x y ) across the line `. Hints: (i) The matrix that rotates vectors counterclockwise by angle θ is (cos θ − sin θ sin θ cos θ ) . (ii) Reflecting across the line ` is equivalent to rotating the plane clockwise by an angle that moves ` to the x axis, then applying a reflection across the x axis, then rotating counterclockwise to move ` back where it started. You can use matrix multiplication to build one matrix that performs these three steps in order.