There are 3 shapes on a 9x9 grid. Which shape is closest to the red 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: red rectangle at (1, 7)
Distance from target shape to orange right_triangle at (4, 5): 5
Distance from target shape to yellow rectangle at (7, 5): 8
Closest shape is the orange right_triangle at (4, 5) with distance 5</think>

<answer>(4, 5)</answer>