What should an administrator use as an alternative to a Process Builder to expedite the time required to update the records?

The accounting team at Universal Containers is looking to roll out two new custom objects: a parent Invoice object and a child Payment object. Whenever a Payment record is created, the Invoice object should be updated to reflect the current outstanding value of the Invoice.
What should the administrator do to build this functionality?

An administrator is planning he release process for the year. The team will be using change sets to process deployment to production.
Which three best practices should be considered?

A sales rep needs to help cross-sell an opportunity but is unable to make updates on the record or update the opportunity team.
Which two options would be required for a sales rep to add a rep to the opportunity team?
Choose 2 answers

Users at AW Computing are receiving a duplicate message when they enter contacts with common first and last names. Management wants to improve the user experience but also keep the data Integrity of contacts.
What should an administrator implement for this issue?