2.5.3 Can you answer these questions?

Can you answer these?

2.5.3.1 Drawing a plane inside a sphere in TikZ

http://tex.stackexchange.com/questions/290957/drawing-a-plane-inside-a-sphere-in-tikz

I have the following code, which is basically a modified version of the sphere example from TeXample.net. 
\documentclass[crop,tikz]{standalone} 
\usepackage{pgfplots} 
\usetikzlibrary{calc,fadings} 
...
 

- asked by Mereenie 4votes

2.5.3.2 How to make 3D ribbon plots in PGF/TikZ

http://tex.stackexchange.com/questions/291073/how-to-make-3d-ribbon-plots-in-pgf-tikz

I'd like to make a bunch of 3D ribbon plots in TikZ or PGF, I've taken a look around and I've found no hints on how this might be accomplished, is there a simple way to do this? I'd settle for a 3D  ...
                                                                                  

                                                                                  
 

- asked by Sean DS 2votes

2.5.3.3 Tufte page numbering on first page of new chapter

http://tex.stackexchange.com/questions/290310/tufte-page-numbering-on-first-page-of-new-chapter

I am using the Tufte-Book style but have very short chapters. The page number is not added to the first page of a new chapter so I end up with very few numbered pages at all. 
Question: How can I add  ...
 

- asked by David 3votes

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