1.This is Mr.li for ____ son I bought a book yesterday

1.This is Mr.li for ____ son I bought a book yesterday
This is Mr.li for ____ I bought a book yesterday.
分别是 whose 和 whom 为什么?
2.He lives in the room ____ window faces to the north.
He lives in the room,the window _____ faces to the north.
分别是 whose 和 of which 为什么?
这2句的分析及句子成分