Question

el libro complete this cell phone conversation with the correct forms of estar.
gustavo hola, pablo. ¿(1) en la residencia estudiantil?
pablo sí, (2) en la residencia.
gustavo necesito el libro de física.
pablo ¿dónde (3) el libro?
gustavo el libro (4) en mi cuarto (room), al lado de la computadora.
pablo ¿dónde (5) la computadora?
gustavo la computadora (6) encima del escritorio.
pablo ¡aquí (here) (7) la computadora y... el libro de física!

Explanation:

1. For (1), the subject is "tú" (you), so the correct form of "estar" is "estás".
2. For (2), the subject is "yo" (I), so the correct form is "estoy".
3. For (3), the subject is "el libro" (the book), which is singular, so "está".
4. For (4), the subject is "el libro" (the book), so "está".
5. For (5), the subject is "la computadora" (the computer), which is singular, so "está".
6. For (6), the subject is "la computadora" (the computer), so "está".
7. For (7), the subject is "la computadora y... el libro de física" (the computer and... the physics book). When there are multiple subjects joined by "y" (and), if the first subject is singular and the second is also singular, in Spanish, we use the form according to the first subject. But here, it's a common construction and we use "está" (because it's a description of location and the verb agrees with the first element in some cases of this construction).

Answer:

(1) estás
(2) estoy
(3) está
(4) está
(5) está
(6) está
(7) está