Given the following list of coordinate points:
{obstacles}

Please select all points from the list that satisfy the following condition:
The x-coordinate (x) of the point must be within the closed interval from {a} to {b}.

Please strictly follow this format for the output, including only the selected points:
### Output Format
<obstacles> = [ (x1, y1), (x2, y2), ..., (xn, yn)]


<assistant>
<obstacles> = 