8.26.3 Can you answer these questions?

8.26.3.1 Package alltt does not typeset double quoting marks
8.26.3.2 How to change an environment in its body
8.26.3.3 Putting subfigures side by side using subcaption and caption package
8.26.3.1 Package alltt does not typeset double quoting marks

https://tex.stackexchange.com/landing/r/digest?cta=question&id=641412

For a report I would like to typeset HOL4 code in tt font with the alltt environment. 
My code includes U+201C Left Double Quotation Mark and U+201D Right Double Quotation Mark. 
The alltt environment ... 
[unicode] [typewriter] [utf8]
 
asked by Gergely https://tex.stackexchange.com/landing/r/digest?cta=user&id=27523 Score of 1
answered by Gergely https://tex.stackexchange.com/landing/r/digest?cta=user&id=27523 Score of 0
8.26.3.2 How to change an environment in its body

https://tex.stackexchange.com/landing/r/digest?cta=question&id=641994

I have the below code. 
\documentclass{article} 
\newcounter{ex} 
\newenvironment{ex}{% 
\par\noindent\refstepcounter{ex}{\bfseries Ex \theex.\, } 
}{} 
\... 
[macros] [environments] [renewcommand]
 
asked by Nam Tran Le https://tex.stackexchange.com/landing/r/digest?cta=user&id=193916 Score of 1
8.26.3.3 Putting subfigures side by side using subcaption and caption package

https://tex.stackexchange.com/landing/r/digest?cta=question&id=642045

I have the following piece of code: 
\documentclass{article} 
\usepackage{subcaption,caption} 
\usepackag{graphicx} 
\begin{document} 
\begin{figure}[hbt!] 
\centering 
\begin{... 
[graphics] [subfloats] [subcaption] [sidebyside]
 
asked by hi15 https://tex.stackexchange.com/landing/r/digest?cta=user&id=120599 Score of 1
answered by Mico https://tex.stackexchange.com/landing/r/digest?cta=user&id=5001 Score of 0