Consider the circle, which has 4 intersection points with axes, in the graph.

State the coordinates of the centre in the form $(a, b)$.

Please directly answer the question and provide the final value, e.g., 1, 2.5, 300.
Question: Consider the circle, which has 4 intersection points with axes, in the graph.

State the coordinates of the centre in the form $(a, b)$.

Please first conduct reasoning, and then answer the question and provide the final value, e.g., 1, 2.5, 300, at the end.
Question: Consider the circle, which has 4 intersection points with axes, in the graph.

State the coordinates of the centre in the form $(a, b)$.
