With a detailed graph and explanation, compare and contrast the behavior of average product of fixed factors and the behavior of average fixed cost".

This is not an homework question. I know you will think so because of the way I phrased it, I really need a detailed explanation since the people here are expert in the field. I'm in my second year at college studying economics major. I really like applying economics to real life situations and I believe it is one of the best courses ever. I also like studying a lot. I'm to take principles of microeconomics as part of my courses this semester, so I was actually just reading ahead. Then I saw something about how average product can be applied to fixed factors and average fixed cost but it was very short and wasn't explained well. I know that fixed factors means the factors that doesn't vary and it is in the short run and average fixed cost means fixed cost divided by quantity but I just don't get that concept of behavior of average product of fixed factors and average product of average fixed cost. Please, help me shed some light on it. Thanks.