Rotate △ABC 90 degrees (counterclockwise) about the origin to create AA' B'C'. What are the coordinates of the following points? (3 points)

To rotate a point \( (x, y) \) 90 degrees counterclockwise about the origin, you can use the following transformation:

\[
(x, y) \rightarrow (-y, x)
\]

If you have the coordinates of point \( A \) as \( (x_A, y_A) \), then the coordinates of point \( A' \) after rotation will be:

\[
A' = (-y_A, x_A)
\]

If you provide the coordinates of the original point \( A \) (and potentially points \( B \) and \( C \) if needed), I can help you find the coordinates of \( A' \). Please provide the coordinates for point \( A \).