The convert button on leads should NOT appear until the lead status picklist is set to a qualified. What should an app builder suggest to meet these requirements?

Which statements are true regarding Roll-Up Summary Fields? (Choose three.)

Cloud Kicks has leads owned by users and queues. The sales manager wants the status to change to working when a user takes ownership.
What does an app builder need to have in the criteria to ensure the process runs without error?

Universal Containers has created two custom objects called Seminars and Attendees. Organization-wide defaults for those objects have been set to private. Universal Containers wants to set up a new junction object between these objects. A select group of users should be able to edit records in the junction object.
Which two steps should an app builder take to configure the proper security?

Ursa Major Solar is ramping up the sales team to meet increased demand. As part of the short ramp up for these new reps, the manager wants to provide a help guide to enable reps to easily get help where needed during the different sales processes.
Which solution should an app builder recommend?