when using these quantity words in french which small word comes between the quantity and the item (hint this little word has 2 meanings)

Need in these questions in french ! fill in the blank with the word that best completes the sentence. vous de l'aérobic. - fais - fait - faisez - faites decide if the following sentence is grammatically correct or incorrect. elle fait de la musculation le week-end. correct incorrect decide if the following sentence is grammatically correct or incorrect. mike joue du bateau. correct incorrect fill in the blank with the correct form of faire. ils de la lutte. - faient - font - faisent - fons fill in the blank with the correct form of faire. on des vidéos en vacances. - faisons - fait - fais - faisez