Question: Define and test a function named posterize ( in the file posterize.py ) . This function expects an image and a tuple of RGB values

Define and test a function named posterize (in the file posterize.py). This function expects an image and a tuple of RGB values as arguments. The function modifies the image like the blackAndWhite function, but it uses the given RGB values instead of black. (LO: 8.2)

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