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6. Write a function called swapGB that takes an image as an argument and returns a copy of the input image, where all the green channels and the blue channels are swapped. If the color of a pixel is (r, g, b) in the input image, its color in the output must be (r, b, g) . You must useimageMap, without using loops.

7. Write a function called shiftRGB that takes an image as an argument and returns a copy of the input image, where all the channels are shifted. If the color of a pixel is (r, g, b) in the input image, its color in the output must be (b, r, g) . You must use imageMap, without using loops.