Übung 1: https://learningapps.org/watch?app=17662367 Übung 2: https://learningapps.org/watch?app=107685 Übung 3: https://learningapps.org/watch?app=2636719 Übung 4: https://learningapps.org/watch?app=4558555 Übung 5: https://learningapps.org/watch?app=1664939