Welcome to Steemit, @nabi-muhammad! We haven't been here long ourselves. Glad you enjoyed this post, and glad to meet you!
This is a 4 part series on the subject. The others will be posted in the coming days. If you would like, follow us, so you don't miss the rest of the study. You can do that by clicking on our user name, then clicking "Follow" button in the top right of our blog page.
If you have any questions, feel free to ask, and we will answer them to the best of our ability.
God bless!