2a.) (Jeśli masz 10 lat) - Yes, I am Ten years old.
2b.) (Jeśli nie masz 10) -No, I am not Ten years old, I am (twój wiek) years old
3.) No, I am not happy, I'm Sad
4.) No, my mother is not strong, she is clever.
5.) No, my father isn't clever, he is strong.