Intro to Logic-Sec, 4.4 Operations on Categorical Propositions

Here are some questions to Answer. (Just so you perform one operation on each proposition.) 1. Form the Converse of the following proposition. All A are B. 2. Form the Obverse of the following proposition. No A are B. 3. Form the Contrapositive of the following propositions. Some A are B. and Some A are not B. 4. An 'Immediate Inference.' If I have an argument and the premise is No A are B, and the Conclusion is No Non-B are non-A, is it valid or invalid? Look at the Venn Diagrams. Draw them here if it is possible on Moodle (some of you have figured that out.) 5. This will be a bonus question because I think it's hard. It involves higher order thinking, or "meta" thinking, or interpretation. We said earlier that the 'term compliment' of a term was that which denotes all things in the world not denoted by the original term. So if Oak trees is a category, denoted by O, then all things not oak trees is denoted by non-O, its term compliment. Why is this valuable information? https://youtu.be/0fKBhvDjuy0​ - Link to YouTube video