Northern Trail Outfitters (NTO) has a private sharing model for records containing a customer's credit Information. These records should be visible to a sales rep's manager but hidden from their colleagues.
How should an administrator adjust NTO's sharing model to ensure the correct amount of confidentiality?
On the Contact record, if a contact has the value of 'CEO' in the Title field, the administrator wants to require the users to also put a phone number in the Phone field.
What formula should the administrator put in the Error Condition Formula of a validation rule to enable this?