What is recommended to refresh a fullsandbox?

Universal Containers's app builder has been tasked with replacing workflow rules and Apex triggers with Process Builders where possible.
What are two important considerations an app builder should know before the project is started?
Choose 2 answers

Universal Containers sales reps can modify fields on an opportunity until it is closed. Only the sales operation team can modify the post closed follow-up dates and post closed follow-up comments fields. How can these requirements be met?

Cloud Kicks (CK) is finding sales reps are inconsistent in data entry when deals are won. CK requires that custom shoes are shipped within two weeks after the close date. A custom field called Scheduled Ship Date on the opportunity records the ship date.
How should the app builder ensure this field is properly filled out before setting the opportunity to closed won?

Sales rep at universal containers use salesforce on their mobile devices. They want a way to add new contacts quickly and then follow up later to complete the additional information necessary. What mobile should an app builder recommend?