So, you can be able to make a prediction and understand the cycle.
The doc is blank but thanks for the points!!
All the choices depend on the slide and the last one is a must. the first one should be for the introduction and conclusion and the second one should be used to make ideas conveyed in the presentation easier to understand.
You're writing code in 2018 ... a lot of code editors and IDEs have linting built-in, smart autocomplete functionality, etc.
Given the fact that xhtml has mandatory rules, you just need a code editor/plug-in that has strict guidelines for code completion/error handling regarding xhtml ... use VScode editor (you'll definitely find a linting plug-in for html/xhtml linting).
