diff --git a/20.png b/20.png new file mode 100644 index 0000000..3707552 Binary files /dev/null and b/20.png differ diff --git a/21.png b/21.png new file mode 100644 index 0000000..3e6e1c8 Binary files /dev/null and b/21.png differ diff --git a/22.png b/22.png new file mode 100644 index 0000000..8e79fcc Binary files /dev/null and b/22.png differ