You have an Azure subscription that contains a resource group named RG26.
RG26 is set to the West Europe location and is used to create temporary resources for a project. RG26 contains the resources shown in the following table.
SQLDB01 is backed up to RGV1.
When the project is complete, you attempt to delete RG26 from the Azure portal. The deletion fails.
You need to delete RG26.
What should you do first?