Which three actions should you perform in sequence?

Explanation/Reference:
Note:
* You must use the Mount-SPContentDatabasecmdlet to attach a content database to a web application.
* (incorrect) Using the SharePoint Central Administration pages to attach a content database is not supported for upgrading.
* This is the fourth phase in the process to upgrade SharePoint 2010 Products data and sites to SharePoint 2013. The process includes the following phases that must be completed in order:
1.Create the SharePoint 2013 farm for a database attach upgrade
2.Copy databases to the new farm for upgrade to SharePoint 2013
3.Upgrade service applications to SharePoint 2013
4.Upgrade content databases to SharePoint 2013 (this phase)
5.Upgrade site collections to SharePoint 2013
* Test-SPContentDatabase
Tests a content database.
Use the Test-SPContentDatabasecmdlet to test a content database against a Web application to verify all customizations referenced within the content database are also installed in the web application. This cmdlet can be issued against a content database currently attached to the farm, or a content database that is not connected to the farm. It can be used to test content databases from SharePoint 2010 Products and from SharePoint Products and Technologies.
* (incorrect) There is no method Move-SPWebApplication
Reference: Upgrade content databases to SharePoint 2013