Shop Bathroom Vent help

[NathanSMSU]

First time DIY plumber here....I built a 40x60 red iron shop recently and I'm starting on a small bathroom (6x9). I had a pro plumber do the rough-in that you see below. The plumber installed one (I believe this is called a "revent") near the shower drain. My question is this 2' pipe sufficient for the whole bathroom, or should I run vents ("true vents") up off the two sink drains ultimately connecting into the main vent? Thanks in advance for your advice!!

 

[Jeff H Young]

yes both sinks will have tees on them and vent up. so we are looking what will be at 3 vents