There are 6 shapes on a 10x10 grid. Which shape is closest to the yellow rectangle in terms of Manhattan distance? The final answer is the grid position of the closest shape like (row_index, column_index).
<think>Target shape: yellow rectangle at (7, 9)
Distance from target shape to purple right_triangle at (0, 5): 11
Distance from target shape to brown right_triangle at (7, 5): 4
Distance from target shape to pink right_triangle at (2, 4): 10
Distance from target shape to cyan square at (1, 7): 8
Distance from target shape to blue trapezoid at (2, 9): 5
Closest shape is the brown right_triangle at (7, 5) with distance 4</think>

<answer>(7, 5)</answer>