There are 4 shapes on a 7x7 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 (4, 5)
Distance from target shape to blue rectangle at (2, 4): 3
Distance from target shape to brown square at (6, 3): 4
Distance from target shape to gray trapezoid at (0, 5): 4
Closest shape is the blue rectangle at (2, 4) with distance 3</think>

<answer>(2, 4)</answer>