AB4-Lösungen
Merge pull request #49 from hiars123/master

AB4-Lösungen
AB3 + AB4 Lösungen
Merge pull request #50 from cdau/master

AB3 + AB4 Lösungen
E-Aufgaben Fehler verbessert
Merge pull request #51 from hiars123/master

E-Aufgaben Fehler verbessert
Check-Files
Merge pull request #52 from hiars123/master

Check-Files
AB3 - fertig
Merge pull request #53 from hiars123/master

AB3 - fertig