Answers in bold and underlined.
Answer 1: Tus libros están en la mesa.
Translation 1: Your books are on the table.
Answer 2: Es su nieto.
Translation 2: It's his grandson.
Answer 3: Nuestros abuelos son simpáticos.
Translation 3: Our grandparents are nice.
Answer 4: Es mi primo.
Translation 4: He is my cousin.
Answer 5: Sus tíos son de Perú.
Translation 5: His uncles are from Peru.