Read the following sentences:

I.Toni Morrison is a writer whose books are internationally appreciated.
II.I was trying to find out the time which I would have to catch my train.
III.This is the ice cream shop whereby my husband and I had our first date.
IV.I can't remember the deadline. Where should we hand in the final paper for this course?
V.Whichever one of you disrespected the teacher will have to go to the principal's office.

Regarding the use of the relative words in bold, which sentences are correct?