Tighten the slip nut connections, replace worn-out washers, or apply plumber’s tape to the threads for a better seal.

Yes! If you’re comfortable with basic plumbing, you can: Turn off water supply. Disconnect pipes. Remove old sink. Install new sink and reconnect plumbing.

Possibly, if your vanity is wide enough (minimum 48"). You’ll need to modify plumbing and countertop cutouts.