I had a conversation with a prof from Harvey Mudd and another prof from somewhere else who was an AP calc grader. The HMC prof said they quit giving credit for 5&#x27;s because not all recipients of 5&#x27;s could do the work. The grader commented that he could understand how, as the range of 5&#x27;s is quite broad. My take-away was that there is insufficient granularity at the high end.