Réponse :
Must / Needn't / Must / Mustn't / needn't / must / mustn't / needn't / mustn't / must
Explications :
Must used for obligation
Mustn't used for non obligation
Needn't ( example 1 ; means that we have whatever we need so there is no goal from going to the shop // e.g. 2 ; you are not able to ask me each time you need biscuits , i give you the freddom to take it yourself ; there is no need to request me // e.g.3 ; it doesn't matter whether it is big or not all what i care about is having a garden )
I Wish that my explanation is clear . & Good luck .