You try to cover all the questions but unfortunately you are unable to go into depth in most of the questions as the depth was required you can explain more about the importance and the benefits of cryptocurrency mining but in the above questions you says right that steem can be mined but you don't told us that it can only be done by the top 21 witnesses at the blockchain.

You have told us about CPU GPU and Asis method of cryptocurrency mining and all these are good methods agree with it but you should go into more depth and over all I want to say that next time you must try to improve the quality of your post and search many more things to tell about each question in detail