Okay Sean, I see what your missing. You are not comparing values from the reference to your drawing. Remember, squint until all you see is dark and light. everything dark will be in the shadow, and everything light will be in the light. I can tell you are looking at this with your eyes wide open, and searching for values. I did a sketch of your pear, which you drew pretty well, and did the process to show you how to do this assignment. I hope this makes sense and is helpful :)