you have to do it yourself because I haven read the story.
You can tell it--> Estoy acostado or Yo estoy acostado,
but the correct is Estoy acostado.
Answer:
¿<em><u>Lo</u></em><em> </em>tienes en tu mochila?
Explanation:
translation: <em><u>Do you</u></em> have <em><u>it</u></em> in your backpack?
Hope this helped! :)