Part II $(30\%)$: Histogram equalization:

Complete function part$2\_$histogram$\_$equalization$()$ to perform a $64-$bin grayscale histogram equalization on the same test.jpg image used in the last part. You need to plot the original image, its $64-$bin histogram, the image after histogram equalization, and its $64-$bin histogram.

You are not allowed to use the Skimage functions, i$.$e$.,$ exposure.histogram, exposure.equalize$\_$hist, or any equivalent functions from any other library for this part.

Tutorials on histogram equalization: