You have an Azure AD tenant that is linked to the subscriptions shown in the...

User1 can resize VM1. Yes, this is correct. According to the tables, User1 is assigned the Contributor role at the subscription level for Sub1. The Contributor role grants full access to manage all resources in the subscription, including the ability to resize virtual machines1. Therefore, User1 can resize VM1, which is a resource in RG1 under Sub1.

User2 can create a new storage account in RG1. No, this is not correct. According to the tables, User2 is assigned the Reader role at the resource group level for RG1. The Reader role grants read-only access to view existing resources in the resource group, but not to create, update, or delete any resources2. Therefore, User2 cannot create a new storage account in RG1.

User3 can assign User1 the Owner role for RG3. No, this is not correct. According to the tables, User3 is assigned the Storage Account Contributor role at the resource group level for RG3. The Storage Account Contributor role grants full access to manage storage accounts and their data in the resource group, but not to assign roles to other users3. To assign roles to other users, User3 would need a role that has Microsoft.Authorization/roleAssignments/write permissions, such as User Access Administrator or Owner4. Therefore, User3 cannot assign User1 the Owner role for RG3.