:) I got these incorrect. Why are they incorrect? and what are the correct answers?

Answer:
1. El estudiante le entrega la tarea.
2.
3. Yo les entrego las novelas.
Explanation:
I can't fully read the second question, but the second answer is incorrect because you accidentally gave the answer for the first question. The first and third are incorrect because you needed to use an indirect object pronoun instead of using "la maestra" and "Mario y Julio"