Add New Column Based on Days Between Two Dates Result

I'm using the Subject Area Workforce Management - Work Relationship Real Time. Below is a formula that calculates the number of days between Termination Notification Date and Termination Date. I need to add a new column (identifying whether or not a 28 day notification was given) where if the number of days from that formula is >=28 then "Yes", else "No"

TIMESTAMPDIFF(SQL_TSI_DAY, "Worker"."Termination Notification Date", "Worker"."Termination Date" )

I would appreciate advice on how to do this please.

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