Overview
so bascially what i want to do is to write down the equations in my own wordings for the average occupation part.1. how to get from equation 13 to equation 16 and explain how to calculate them to equation 18
2. how to get from equation 14 to equation 17 and then how to use them to achieve 19
3. explain how does equation 16 get to equations 20 and how does equation 17 get to equation 22
4. how to use equation 20 to achieve equation 25
5. how to use equation 26 and equation 27 to achieve equation 28
6. how to go from equation 28 to equation 30.