Explanation
User Territories are records that associate users with service territories for sharing purposes[90]. Creating a new user territory associated with the Service Territory and dispatcher would allow giving access to all relevant Midwest records by linking them with their corresponding service territory[91]. Configuring and running the User Territory Sharing Job in Field Service Settings would allow updating sharing rules based on user territories automatically at regular intervals such as daily or weekly[92]. Assigning a new user territory and adding each of the assigned service resources would not give access to all relevant Midwest records

Explanation
The technician would use a Return Order to create a return for the unused circuit board. The Return Order would specify the quantity of the product being returned, the reason for the return, and the shipping address.
The technician would then use a Product Receipt to record the receipt of the returned product. The Product Receipt would specify the quantity of the product received, the condition of the product, and the location of the product.
The other two options are incorrect because they are not used to return products. A Work Order is used to track the work that needs to be done on a product or service. A Product Transfer is used to move products from one location to another.

Explanation
A relevance group is used to filter resources based on a custom field value. By creating a relevance group on the work rule to filter based on the tier number, the system can prioritize resources with higher seniority for a service appointment.
References: https://help.salesforce.com/s/articleView?id=sf.fsl_work_rules.htm&type=5