diff --git a/fig/abs.png b/fig/abs.png
new file mode 100644
index 0000000..684afaf
Binary files /dev/null and b/fig/abs.png differ
diff --git a/fig/framework.png b/fig/framework.png
new file mode 100644
index 0000000..f5920a7
Binary files /dev/null and b/fig/framework.png differ
diff --git a/fig/stat.png b/fig/stat.png
new file mode 100644
index 0000000..6b3ad19
Binary files /dev/null and b/fig/stat.png differ