I have started an A/B test from the email. Right click, new test. I have set up my test criteria. Same email with two subject lines. My question is, when I am setting up my smart campaign how do I correctly choose and execute the A/B test? In my flow, for send email, I chose my A/B email test. Will it automatically send to 5% of my population (my criteria) and stop? Do I then declare my winner and will the camapaign automatically kick off again? I can't find any documentation on how to execute, once you have the a/b test established.