Mexico's northern neighbor: Abbr.

Leonardo da Vinci's work, e.g.3 Six-pack muscles, for short3 Where to drive a car4 "Is that for here or ___?" (question at a restaurant, maybe): 2 wds.4 Ray-___ (brand of sunglasses)3 Address similar to "Dude!"3 Points an arrow at a target, say4 Biblical character with an ark4