When should Unmanaged packages be created? Choose 2 answers

Universal Containers created a custom object called Component to capture details about products sold.
What approach should an app builder take to show Component as a related list on Product?

UVC is importing 1000 records into salesforce. They want to avoid any duplicate records from being created during the import. How can these requirement met?

Universal Containers manages leads in a Lead qualification queue where sales reps can accept ownership of the Lead. Campaign members are required to have a sales owner.
What validation rule should an app builder configure?

Cloud Kicks's management team frequently travels and wants to approve requests from their team on the go via Chatter.
Where would an app builder enable this ability?