请讲解上传的题目---24. As shown in the figure, it is known that the line y = kx - 6k passes through points A and B, and if S△OAB = 9. (1) Find the value of k. (2) If point C is a point on line segment OA, rotate line segment CB clockwise around point C by 90° to get CD, at this time point D happens to lie on line AB. ① Find the coordinates of points C and D. ② Let the line BE be the reflection of line AB across the y-axis, intersecting the x-axis at point E. If point P is on line BE, and Q is on line AB, does there exist a quadrilateral with vertices C, D, P, Q that is a parallelogram? If it exists, directly write down the coordinates of all points Q that satisfy the condition; if it does not exist, please explain the reason. **Diagram 1 Description:** * Type: Coordinate plane diagram. * Main Elements: * Coordinate Axes: X-axis (labeled 'x') and Y-axis (labeled 'y') intersecting at the origin O. * Points: O (origin), A is on the positive x-axis, B is in the second quadrant. * Line: A straight line segment connecting points B and A passes through the first quadrant. **Diagram 2 Description:** * Type: Coordinate plane diagram. * Main Elements: * Coordinate Axes: X-axis (labeled 'x') and Y-axis (labeled 'y') intersecting at the origin O. * Points: O (origin), A is on the positive x-axis, E is on the negative x-axis, B is in the second quadrant. * Lines: A straight line passing through points B, O, and A. Another straight line passing through points B and E. Both lines intersect at B and O. (Correction: The second diagram shows lines AB and BE. Line AB passes through A, B, and O. Line BE passes through B, E, and O). * Labels: O, A, B, E, x (axis label), y (axis label).