Помогите составить 5 вопрос и 1 отрицательный к предложению They have eaten the cake. Пожалуйста!!!!

Отрицательный: (если предложение) They haven't eaten the cake. Вопросы: Who has eaten the cake? What have they done with the cake? What have they eaten? Здесь у меня пока только три вопроса получилось составить...

They haven't eaten the cake. They have eaten the cake, haven't they? Have they eaten the cake? Have they eaten the cake or a pie? Who has eaten the cake? What have they eaten?