Thank you so much! I got it!
If you inspect the author image it says its 28px by 28px I am trying to get it up to 45px by 45px. The code that I have tried in the Custom CSS area brings the size up but the image is blurry so I am not sure how to increase the image size while keeping the image looking good.
https://powerandwisdom.com/the-3-main-types-of-intelligence/