Filter dates based on a grouped date slicer

Hi,

Need your help on how I can filter a specific group of dates (previous week, last 4 weeks, last 8 weeks, year to date) based on a selected date.

Or can I have the relative date filter be based on another date slicer instead of getting the system date? Example is the image below: If I select 2/26/2018 on the week slicer, then on the relative filter it should show the last 4 weeks (2/05/2018-2/26/2018).