Помогите срочно 4 и 5 упражнения!!!

1. why
2. where
3. whose
4. when
5. which
6. who

1. My grandmother, who is seventy-one now, was a cook.
2. The girl, whose name is Katy, sits behind me in class.
3. “Alice in the Wonderland” is amazing book, which I started to read on Monday
4. One part of Buckingham Palace, where the Royal family live, is closed to the public
5. Moscow is a really huge city, where I was born.