Homework from College. I'm not entirely sure how to do it, but I think I have a somewhat good idea. The chords below need to be transposed to F Major, and we decided they're in the key of D Major:

D - A - Bm - G

This is what I think they would be in F Major:

F - C - Dm - A#

The reason I think this is because there are three semitones from D to F. Is this right? If not, why?