There are 5 shapes on a 7x7 grid. Which shape is closest to the yellow right_triangle 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 right_triangle at (5, 1)
Distance from target shape to cyan right_triangle at (0, 5): 9
Distance from target shape to green right_triangle at (4, 5): 5
Distance from target shape to red trapezoid at (3, 0): 3
Distance from target shape to gray rectangle at (0, 0): 6
Closest shape is the red trapezoid at (3, 0) with distance 3</think>

<answer>(3, 0)</answer>