401K setup

Hello, we recently have implemented a 401K plan.  I am wondering if someone can tell me if I can set things up properly in Sage 50 with the options our company offers.  They are as follows:

Employer contributes a straight 8% for every employee, pre-tax

Employees have the option to contribute to a pre-tax 401K or a Roth 401K

Do I need to set up a special formula for the straight 8%? Actually the 8% is broken down into a 3% and a 5% contribution.  Is there a way to separately account for those? Also to separately account if an employee is depositing to the pre-tax 401K?

Thank you in advance.  :)