Solve using Python

6.21 Write a function to mirror along the diagonal from (0,0) to (width, height). 6.22 Write a function to mirror along the diagonal from (0, height) to (width, 0). 6.28 Write a general crop function that takes a source picture, the start X value, the start Y value, the end X value, and the end Y value. Create and return the new picture and copy just the specified area into the new picture