Write a function called:

def maxColor$($picture$)$:

which makes the RGB values at each pixel equal. Change the RGB values at each pixel to be the

maximum of the original $3$ values. For example, if a pixel has the RGB values $(25,128,100),$ they are

changed to $(128,128,128).$ The built$-$in max function will be useful. It returns the maximum of its

parameters. Below is an example using Barbara$$s picture.