Я конечно не англичанин и мои ответы могут быть кривыми, но постараюсь)
My birthday in 15 september. What is his name? - Petya. - What he kind of person he is? - Petya is good, friendly, very cute. He is 11 years old. He speak on English and French. This is my grandpa. He is 72 years old. My brother is 2 years old. He very funny. Vanya enjoy guitar. How old is your sister? - 10 years old. Who Petya? - This is my brother. Who Anya's father? - His name is Michail. He is pilot. Whose daughter Anya? - Michail's and Svetlana's.