universal containers has several new fields they requested for the opportunity product object. What should an app builder be able to configure using a formula field ?

What determines whether a user can create a new record using a specific record type?

Universal Containers has deployed custom tabs to Production via changes sets, without including the profile settings or permission sets.
What is the settings for the visibility of custom tabs?

The DreamHouse Realty (DR) service manager has asked for some improvements in case management to enforce process compliance so that cases are unable to be reverted to an earlier case status, and to ensure that certain fields are required when specific case criteria are met.
What solution should an app builder implement to meet these requirements?

Universal Containers is setting up Salesforce for the first time. Management wants the sales and marketing have different navigation menus in the Salesforce 1 mobile app. Which option is available for an App Builder to satisfy this requirement?