Question

Q1. Who is Miranda's father?
A: He is Prospero.

Q2. What is the name of the person who opens the gate of Milan to King
Alonso?
A: His name is Antonio.

Q3. He is one of the spirits on the magic island. He helps Prospero and
Miranda. He makes a magic storm and attack the ship. Who is he?
A: He is Ariel.
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Are the questions and answers all grammatical? Would you check them?

Answer 1

All are correct.