In Python: Implement three median filters (3 by 3, 5 by 5, and 7 by 7 kernel size), and apply these filters to image1.png and image2.png separately. Show (and discuss as comments) the resulting differences for each kernel on the screen, explain where median filters are most effective. (For convolution operation, you can use built-in function. DO NOT use built-in function for Median filtering.)

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