Giải giúp mình với ạ, reported speech

Cao Kỳ 1. He said to her, "You 'are my friend." 2. Johnny said to his mother, "I don't know how to do this exercise." 3. "Don't come back before one o'clock", advised my brother. 4. "Cook it in butter", Mrs Brown said to her daughler. 5. The pupils said to their teacher, "Please give u ...