Default values for Probation Period and Notice Period per country

Summary:

We want to default Probation Period and Notice Period Values per country basis and for Full-time hires only in Recruiting - Create and Edit Offer Page to reduce the manually effort for recruiters as we are seeing this is more prone to errors.

Can one pls help with the rules to achieve.

Content (required):

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):