hi i have a question and its realy important so plzz help who wants to play truth or dare

Can someone me answer these ten questions. they are on verb forms and adjective-noun agreement.

How to put presence and circumstances in one sentence

What is the correct way to tell your grandfather to buy the book? question 27 options: kaufen sie das buch! kaufen du das buch! kaufst du das buch! kaufen das buch!