1. Implement a copy method for the AddressBook class according to the NSCopying protocol.Would it make sense to also implement a mutableCopy method? Why or why not? 2. Create an NSDictionary...

1. Implement a copy method for the AddressBook class according to the NSCopying protocol.Would it make sense to also implement a mutableCopy method? Why or why not?

2. Create an NSDictionary dictionary object and fill it with some key/object pairs. Then make both mutable and immutable copies.Are these deep copies or shallow copies that are made? Verify your answer.