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?