VEVOR PEX Pipe 3/4 Inch, 100 Feet Length PEX-A Flexible Pipe Tubing for Potable Water, Pex Water Lines for Hot/Cold Water & Easily Restore, Plumbing Applications with Free Cutter,Blue

Yes

Depends on where you live. If you're in a cold region than no (unless it's below the frost line). I would always run through a conduit in case there is an issue in the future.