Develop a project network consisting of at least 20 steps that should be done to complete the project

Develop a project network consisting of at least 20 steps that should be done to complete the project. As the case suggest, keep the level of detail for these activities general, rather than specific. Be sure to indicate some degree of precedence relationship among the activities. 
2. Suppose you now wanted to calculate duration estimates for these activities. How would you make use of the following approaches? Are some more useful than others? 
3. Joe was trying to decide which scheduling format to employ for his planning: AON or AOA. What are some of the issues that Joe should first consider prior to choosing between these methods?