Помогите описать сестричку. У моей мамы есть племянница

My mother has got a niece. Her name is Dasha. She is fifteen. She has got a long dark hair. She is tall. Dasha lives in Klintsi in Gagarin Steet, 22. She is studying in a medical college. Her favorite subject at the college is physical culture. My cousin is very smart and kind.