diff --git a/img/16.png b/img/16.png index 167ab9e..dfaadf9 100644 Binary files a/img/16.png and b/img/16.png differ diff --git a/img/18.png b/img/18.png index da7ca51..9353d9c 100644 Binary files a/img/18.png and b/img/18.png differ diff --git a/img/19.png b/img/19.png new file mode 100644 index 0000000..b2f24e5 Binary files /dev/null and b/img/19.png differ diff --git a/img/21.png b/img/21.png index b8b1cec..aa9627a 100644 Binary files a/img/21.png and b/img/21.png differ