Read the image 'geisel.jpg$\text{'}$ using the imread$()$ function. Create the first grayscale image with variable name gray$1$ by averaging the RGB channel values of the image, and create the second grayscale image with variable name gray$2$ using the built$-$in rgb$2$gray$()$ function.

Then plot the two grayscale images of the Geisel library side$-$by$-$side using subplot$()$ function. Read the documentation for the rgb$2$gray$()$ function