This is a photo from when my home was built in 2014. As you can see it was plumbed for a single sink vanity. Like others here I am wanting to replumb the drain to accommodate a double vanity. What’s the easiest way to accomplish this. You can’t see it in the photo but there is 3-4 feet of wall past the single drain pictured which will allow me add the additional drain and vent im assuming. I know very little about plumbing. I figured out how to split the water supply (not pictured here). Thank you in advance!