Write a method blur that makes an image look “blurry” using the following specific algorithm. Set each pixel to be the average of itself and the 8 pixels around it. That is, for the pixel at position (x, y), set its RGB value to be the average of the RGB values at positions (x − 1, y − 1) through (x + 1, y + 1) Be careful not to go out of bounds near the edge of the image; if a pixel lies along the edge of the image, average whatever neighbors it does have.

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