7.32.3 Can you answer these questions?

7.32.3.1 Formatting References: Journal Articles with Volume and Number
7.32.3.2 Adding labels to bar chart
7.32.3.3 Apostrophes not printed in math mode
7.32.3.1 Formatting References: Journal Articles with Volume and Number

https://tex.stackexchange.com/landing/r/digest?cta=question&id=598957

as I am quite new to LaTeX a friend made most of the presetting. Now I would like to change the reference of a journal article. Now it is: 
Vgl. JA~\274ngling, Clemens: Struktur und Produktion eines ... 
[biblatex]
 
asked by qu33ristan https://tex.stackexchange.com/landing/r/digest?cta=user&id=221860 1 vote
7.32.3.2 Adding labels to bar chart

https://tex.stackexchange.com/landing/r/digest?cta=question&id=598935

I am trying to add labels on top of the bars in my graph but it is not working. I want it to be the y-value that shows up but instead its numbering the bars. 
This is my code so far: 
\documentclass[... 
[tikz-pgf] [pgfplots] [bar-chart] [nodes-near-coords]
 
asked by texstar https://tex.stackexchange.com/landing/r/digest?cta=user&id=241963 1 vote
answered by AndrA~(c)C https://tex.stackexchange.com/landing/r/digest?cta=user&id=138900 0 votes
7.32.3.3 Apostrophes not printed in math mode

https://tex.stackexchange.com/landing/r/digest?cta=question&id=599248

I am trying to write my dissertation using the document class that my university demands that we use for these things and working in overleaf (as suggested by the university too). Strangely, the ... 
[math-mode] [apostrophe]
 
asked by Anguepa https://tex.stackexchange.com/landing/r/digest?cta=user&id=189002 1 vote