diff --git a/docs/source/images/ex7.6_A.png b/docs/source/images/ex7.6_A.png
new file mode 100644
index 0000000000000000000000000000000000000000..50d305c1134ef9d7c218f4c22527e0a436483749
Binary files /dev/null and b/docs/source/images/ex7.6_A.png differ
diff --git a/docs/source/images/ex7.6_C.png b/docs/source/images/ex7.6_C.png
new file mode 100644
index 0000000000000000000000000000000000000000..e43c1ac5b207c0ea0c8a23c94ad66568a6bb2f4d
Binary files /dev/null and b/docs/source/images/ex7.6_C.png differ