diff --git a/Lectures_my/MC_2016/Lecture7/images/buff.png b/Lectures_my/MC_2016/Lecture7/images/buff.png
new file mode 100644
index 0000000..d529c2e
--- /dev/null
+++ b/Lectures_my/MC_2016/Lecture7/images/buff.png
Binary files differ
diff --git a/Lectures_my/MC_2016/Lecture7/images/buff2.png b/Lectures_my/MC_2016/Lecture7/images/buff2.png
new file mode 100644
index 0000000..27370e5
--- /dev/null
+++ b/Lectures_my/MC_2016/Lecture7/images/buff2.png
Binary files differ
diff --git a/Lectures_my/MC_2016/Lecture7/mchrzasz.aux b/Lectures_my/MC_2016/Lecture7/mchrzasz.aux
index 693ddb6..54dd48c 100644
--- a/Lectures_my/MC_2016/Lecture7/mchrzasz.aux
+++ b/Lectures_my/MC_2016/Lecture7/mchrzasz.aux
@@ -71,12 +71,21 @@
\pgfsyspdfmark {pgfid36}{0}{0}
\HyPL@Entry{9<
>}
\pgfsyspdfmark {pgfid37}{23867907}{17900937}
-\@writefile{nav}{\headcommand {\slideentry {0}{0}{6}{10/10}{}{0}}}
-\@writefile{nav}{\headcommand {\beamer@framepages {10}{10}}}
\pgfsyspdfmark {pgfid38}{0}{0}
\pgfsyspdfmark {pgfid39}{0}{0}
-\@writefile{nav}{\headcommand {\beamer@partpages {1}{10}}}
-\@writefile{nav}{\headcommand {\beamer@subsectionpages {1}{10}}}
-\@writefile{nav}{\headcommand {\beamer@sectionpages {1}{10}}}
-\@writefile{nav}{\headcommand {\beamer@documentpages {10}}}
-\@writefile{nav}{\headcommand {\def \inserttotalframenumber {5}}}
+\pgfsyspdfmark {pgfid40}{23867907}{17900937}
+\@writefile{nav}{\headcommand {\slideentry {0}{0}{6}{10/11}{}{0}}}
+\@writefile{nav}{\headcommand {\beamer@framepages {10}{11}}}
+\pgfsyspdfmark {pgfid41}{0}{0}
+\pgfsyspdfmark {pgfid42}{0}{0}
+\HyPL@Entry{11<>}
+\pgfsyspdfmark {pgfid43}{23867907}{17900937}
+\@writefile{nav}{\headcommand {\slideentry {0}{0}{7}{12/12}{}{0}}}
+\@writefile{nav}{\headcommand {\beamer@framepages {12}{12}}}
+\pgfsyspdfmark {pgfid44}{0}{0}
+\pgfsyspdfmark {pgfid45}{0}{0}
+\@writefile{nav}{\headcommand {\beamer@partpages {1}{12}}}
+\@writefile{nav}{\headcommand {\beamer@subsectionpages {1}{12}}}
+\@writefile{nav}{\headcommand {\beamer@sectionpages {1}{12}}}
+\@writefile{nav}{\headcommand {\beamer@documentpages {12}}}
+\@writefile{nav}{\headcommand {\def \inserttotalframenumber {6}}}
diff --git a/Lectures_my/MC_2016/Lecture7/mchrzasz.log b/Lectures_my/MC_2016/Lecture7/mchrzasz.log
index 6273b29..ec42b85 100644
--- a/Lectures_my/MC_2016/Lecture7/mchrzasz.log
+++ b/Lectures_my/MC_2016/Lecture7/mchrzasz.log
@@ -1,4 +1,4 @@
-This is XeTeX, Version 3.1415926-2.5-0.9999.3 (TeX Live 2013/Debian) (format=xelatex 2015.4.1) 9 APR 2016 15:28
+This is XeTeX, Version 3.1415926-2.5-0.9999.3 (TeX Live 2013/Debian) (format=xelatex 2015.4.1) 9 APR 2016 16:14
entering extended mode
restricted \write18 enabled.
%&-line parsing enabled.
@@ -2916,7 +2916,7 @@
]
LaTeX Font Info: External font `plex10' loaded for size
-(Font) <14.4> on input line 468.
+(Font) <14.4> on input line 469.
File: images/BG_lower.png Graphic file (type QTm)