这个题怎么做？---**Question 18** **(Score: 10 points)** **Question Stem:** As shown in the figure, in the planar Cartesian coordinate system xOy, line l passes through points A(0,1) and B(2,2). **Sub-questions:** (1) Find the equation of line l; (2) Translate line l downwards by m units to obtain line l₂. It is known that line l₂ passes through point (-1,-2) and intersects the x-axis at point C. Find the value of m and the coordinates of point C; (3) Point D is a point on line l₂. If points A, B, C, D can form a parallelogram, find the coordinates of point D. **Chart/Diagram Description:** * **Type:** Cartesian Coordinate System (xOy plane) with a single straight line. * **Main Elements:** * **Coordinate Axes:** A horizontal X-axis and a vertical Y-axis are drawn, intersecting perpendicularly at the origin. Both axes have arrows indicating their positive directions. * **Origin:** The intersection point of the X and Y axes is labeled 'O'. * **Line:** A straight line, labeled 'l', is drawn. It has a positive slope. * **Points:** * Point A is marked on line l, located on the positive Y-axis (consistent with A(0,1)). * Point B is marked on line l, located in the first quadrant (consistent with B(2,2)). * **Labels:** The axes are labeled 'x' and 'y'. The line is labeled 'l'. The origin is labeled 'O'. Points A and B are explicitly labeled next to their positions on the line. * **Scale:** Tick marks are present on both axes, indicating a uniform scale, although specific numerical values (other than 0 at the origin) are not explicitly written for each tick. The relative positions of A and B correspond to the given coordinates. The line l appears to intersect the negative x-axis.