9.81.3 Can you answer these questions?

9.81.3.1 Shaping the text area rather than the paragraph

https://tex.stackexchange.com/landing/r/digest?cta=question&id=702769

I would like to be able to define a text area shape for a given page. In effect, the text in the text area (or lists, equations, etc) would be shifted around as if the margins of the page were changed ... 
[tikz-pgf] [margins] [geometry] [shapepar] [parshape]
 

asked by humble_hacker https://tex.stackexchange.com/landing/r/digest?cta=user&id=302496 Score of 1

9.81.3.2 Citation of a reference in a specific format

https://tex.stackexchange.com/landing/r/digest?cta=question&id=702813

I am looking for references and their citation as below. However, I was not able to understand the different articles or question-answers on similar problem. Can one help me to make it in simple and ... 
[bibliographies] [citing]
 

asked by Maths Rahul https://tex.stackexchange.com/landing/r/digest?cta=user&id=233372 Score of 1

answered by Mico https://tex.stackexchange.com/landing/r/digest?cta=user&id=5001 Score of 0

9.81.3.3 Using datatool with tabularray

https://tex.stackexchange.com/landing/r/digest?cta=question&id=703051

This is a followup to or restatement of a previous question, because I had a great deal of difficulty in understanding both the question and the answer. The example file had a lot going on, and I ... 
[tabularray] [datatool]
 

asked by Canyon https://tex.stackexchange.com/landing/r/digest?cta=user&id=101980 Score of 1