diff --git a/cgi-bin/uebung09/questions-edit.php b/cgi-bin/uebung09/questions-edit.php
index fd1ad33..6aa0f3c 100644
--- a/cgi-bin/uebung09/questions-edit.php
+++ b/cgi-bin/uebung09/questions-edit.php
@@ -15,6 +15,7 @@ $an2 = $question['answer2'];
 
 
 echo <<<END
+<link rel="stylesheet" href="style.css">
 <h1>Frage bearbeiten</h1><form action="questions-update.php" method="post">    
    <input type="hidden" name="id" value="$id">
 
@@ -24,7 +25,7 @@ echo <<<END
     <div class="form-box">
 END;
 
-        echo('<input class="form-solution" type="radio" name="solution" value="0" required' . (($sol == 0) ? "checked" : "") . ">");
+        echo('<input class="form-solution" type="radio" name="solution" value="0" required' . (($sol == 0) ? 'checked' : '') . '>');
 
 echo <<<END
         <input class="form-answer" type="text" name="answer0" id="answer0" required value="$an0">
@@ -33,7 +34,7 @@ echo <<<END
     <label for="answer1">Antwort 1:</label>
     <div class="form-box">
 END;
-        echo('<input class="form-solution" type="radio" name="solution" value="1" required' . (($sol == 1) ? "checked" : "") . '>');
+        echo('<input class="form-solution" type="radio" name="solution" value="1" required' . (($sol == 1) ? 'checked' : '') . '>');
 
 echo <<<END
         <input class="form-answer"type="text" name="answer1" id="answer1" value="$an1">
@@ -42,7 +43,7 @@ echo <<<END
     <label for="answer2">Antwort 2:</label>
     <div class="form-box">
 END;
-        echo('<input class="form-solution" type="radio" name="solution" value="2" required' . (($sol == 2) ? "checked" : "") . ">");
+        echo('<input class="form-solution" type="radio" name="solution" value="2" required' . (($sol == 2) ? 'checked' : '') . '>');
 
 echo <<<END
         <input class="form-answer" type="text" name="answer2" id="answer2" value="$an2">