Explanation
A user with manager role above the agent can change ownership on multiple cases that are owned by the agent or by users below the agent in the role hierarchy. A user with the System Administrator profile can change ownership on any case, regardless of the owner or role hierarchy. References:
https://help.salesforce.com/s/articleView?id=sf.case_change_owner.htm&type=5
https://help.salesforce.com/s/articleView?id=sf.admin_userperms.htm&type=5

Explanation
App page and record page are two types of pages that an administrator can build and customize using Lightning App Builder for Salesforce mobile app. App pages are pages that display information or tools that don't belong to a specific record; they can be accessed from navigation menus or tabs in Salesforce mobile app. Record pages are pages that display information or actions related to a specific record; they can be accessed by opening any record in Salesforce mobile app. User page and dashboard page are not types of pages that can be built using Lightning App Builder for Salesforce mobile app; they are types of pages that can be built using other tools such as Profile settings or Dashboard Builder. References:
https://help.salesforce.com/s/articleView?id=sf.app_builder_mobile_pages.htm&type=5

Explanation
To enable users to add repeating tasks in Salesforce, the administrator needs to do two things: first, enable the creation of recurring tasks in activity settings under setup; second, add the create recurring series of tasks field on the page layouts for tasks. This will allow users to create a series of tasks that repeat based on a specified frequency and end date. References:
https://help.salesforce.com/s/articleView?id=sf.tasks_repeating.htm&type=5

Explanation
A lookup field is a type of field that allows administrators to create a relationship between two objects by linking records from one object to another object. For example, a lookup field can link an account record to a purchase record by storing the account ID on the purchase record. A lookup field allows users to select an existing record from a pop-up window or create a new record from the same window. References:
https://help.salesforce.com/s/articleView?id=sf.relationships_lookup.htm&type=5

Explanation
Splits is a feature that should be used to meet this requirement. Splits allows users to assign credit to opportunity team members based on the level of effort contributed by each person toward each deal. Users can create different types of splits, such as revenue or overlay splits, and specify the percentage or amount of credit for each team member. References:
https://help.salesforce.com/s/articleView?id=sf.forecasts3_splits_overview.htm&type=5