what is the right answer ,in java , full explanation please , thank you

9) Examine the following code. There are two classes: Page and Book. Which best describes their relationship? Page page = new Page(); Book book=new Book (page); a) Page HAS-A Book b) Page inherits from Book c) This code is invalid d) Book HAS-A Page 10) Suppose an ArrayList list contains \{"pink", "pink", "blue"\}. What is the list after the following code? String element = "pink"; for (1nt i=0;i