What should be used to match users between Salesforce and Pardot when enabling User sync?

How can an interested lead that comes to Lenoxsoft's website and fills out the Contact Us form receive a follow-up email each time he or she submits?

Which editions of Pardot provides Buisness Units and Einstein functionalities

LenoxSoft wants to ensure that prospects who meet the following criteria are assigned to one of the five users.
In a round robin fashion:
* Completed the "Product Interest" form
* A score higher than 100
* A grade higher than a C
* Is a member of the "Target Account" list
What should LenoxSoft use to accomplish this business requirement?

A marketing user wants an automated way to notify the assigned user whenever a prospect submits a specific form. However, this form has been active for six months so they want to make sure notifications will only go out for prospects that submit the form moving forward.
What should be created to notify the assigned user?