How do i write "a" in spanish? my teacher said this sentence was wrong

"ellos tienen a libro a estudio"

When describing nouns in english, the noun being described comes second. what is the proper format in spanish? the noun being described comes first followed by the describing noun. the describing noun comes first followed by de (of) and the noun being described. the noun being described comes first and is followed by de (of) and the describing noun. the describing noun comes first followed by the noun being described.

Which sentence below has the same meaning as the following sentence

Which pair of verbs correctly completes this sentence? mientras yo la television, mi hermano un articulo para el periodico de la escuela. a. vi, escribio b. vi, escribia c. viste, escribia d. veia, escribia