Explanation
To debug a screen flow that createscontacts, one of the possible causes for a variable missing on the debug screen is that the available for input checkbox was unchecked for that variable. This means that variable cannot be set by external sources such as debug inputs or URL parameters. Tofix this issue, check this checkbox for any variable that needs to be set externally. The flow version or field type does not affect variable availability for input. The available for output checkbox only affects whether variables can be passed out of flows or subflows. References:
https://help.salesforce.com/s/articleView?id=sf.flow_ref_variables.htm&type=5https://help.salesforce.com/s/arti

Explanation
To identify new leads entered by interns from existing leads, the administrator should define a record type and assign it to the interns. This will allow them to select a different record type whencreating leads, and distinguish them from other leads based on record type. Setting up Web-to-Lead form will not work if the interns are entering leads manually in Salesforce. Creating a separate Lead Lightning App or updating the active Lead Assignment Rules will not affect lead identification.
References:https://help.salesforce.com/s/articleView?id=sf.customize_recordtype.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