Formula that is based on date and string

Hi
I have a field called "Project Reporting", which should simply be "Yes" or "No". However, the result depends on the following:
It should be Yes if:
WIP field has a "Yes" string OR
WIP field has "No" string and Completion Date is within the 2 months from the current date.
ELSE:
Project Reporting should be indicated as "No".