Could you check which one is okay of the following sentences? Thank you.<br/><br/><i><b>1. I prefer walking to driving.</b></i><br/><i><b><i><b>2. I prefer tea than coffee.</b></i></b></i><br/><i><b>3. I prefer to walk than to drive.</b></i><br/><i><b>4. I prefer to walk rather than to drive.</b></i>