update the Contact owner and Account owner with the user who created the Case.How to do this ??

How to write a trigger to update each contact's phone using Account's phone if contact's Mailing country is equal to Account's Billing Country.

update the Contact owner and Account owner with the user who created the Case, How to do this

How to write a trigger to update each contact's phone using Account's phone if contact's Mailing country is equal to Account's Billing Country.