2.6.3 Can you answer these questions?

2.6.3.1 Overleaf - Included sty and other input package files common across all my projects
2.6.3.2 Minted text changes _ to \_ in the final PDF
2.6.3.3 lualatex and polyglossia with \setdefaultlanguage german  does not work after recent texlive update

Can you answer these?

2.6.3.1 Overleaf - Included sty and other input package files common across all my projects

http://tex.stackexchange.com/questions/292318/overleaf-included-sty-and-other-input-package-files-common-across-all-my-proje

When an ordinary user specifies TEXINPUTS in Overleaf [e.g., as illustrated here] is there a concept of a ".." directory above the current Project? The reason I would like to be able to do that is  ...
 
- asked by Danny Quah 2votes
2.6.3.2 Minted text changes _ to \_ in the final PDF

http://tex.stackexchange.com/questions/292084/minted-text-changes-to-in-the-final-pdf

I'm writing a report and I found something wrong after compiling it. The PDF file showed things like \_ instead of _ and \textquotedbl{} instead of quotation marks. It's pretty important for me to fix  ...
 
- asked by Romanchio 3votes
2.6.3.3 lualatex and polyglossia with \setdefaultlanguage german  does not work after recent texlive update

http://tex.stackexchange.com/questions/291425/lualatex-and-polyglossia-with-setdefaultlanguagegerman-does-not-work-after-re

Here is a minimal example: 
\documentclass{article} 
\usepackage{polyglossia} 
\setdefaultlanguage{german} 
\begin{document} 
Hallo Welt! 
\end{document} 
And here is the error message: 
...
 
- asked by Georg Grafendorfer 4votes