I am setting up an engagement program that includes three separate emails. I have a case study, a whitepaper, and a request demo email. I want to set it up so that everyone receives the case study first. If they click and download the case study, I want them to receive the request demo email a couple days later, completely skipping the whitepaper email. If they open the case study email but don't click on the content, I want to send them the whitepaper email a couple days later. Lastly, if they don't open the case study email, I want to send it to them again in a couple days. Does anyone have any suggestions on how to set this up?