diff --git a/sheet05/a1/supervisor.sh b/sheet05/a1/supervisor.sh
index e69de29..902e6af 100644
--- a/sheet05/a1/supervisor.sh
+++ b/sheet05/a1/supervisor.sh
@@ -0,0 +1,3 @@
+#!/bin/bash
+# $1 = supervisor username
+echo "not possible with the standard UNIX permissions. See explanation.txt."
\ No newline at end of file