Universal Containers uses a custom picklist field Account Region on the account record. They want this region to be reflected on all related contact records and stay in sync if the value of this field changes on the Account.
How should an app builder meet this requirement?

Use case:
An object called "House" is related to Opportunity, there can be many Houses per Opportunity. On houses, we have a field named "Square feet". We need to show the total of Square feet for all houses on each Opportunity.
What type of relationship should we have?

Universal Containers wants users to have access to the pricing guidelines document when viewing a Contract related to an Account.
What feature should an app builder use to create easy access to the document?

Universal container manages internal projects by department using a custom object called projects. Only employees in the project's respective department should have view access to all of the department's project records. If an employee changes job roles and moves to another department, the employee should no longer have access to the projects within their former department. How can these requirements be met, assuming the organization-wide default for projects is set to private? Choose 2 answers

At Ursa Major Solar, there is a single Lightning record page for the Celestial Bodies custom object; however, there is a Lightning component the app builder wants to restrict to mobile app users.
Which feature on the Lightning app builder should be utilized?