Complete the following tasks on the specified Windows Server 2012 operating system: On a domain controller, create a backup of the WorkstationGPO policy object. Save the backup to \\CorpFiles1 2\Backup\GPOs. On the CorpDC DNS server, enable scavenging of stale resource records on all Active Directory zones as follows: Set the no-refresh interval to 5 days Set the refresh interval to 5 days Apply the setting to existing Active Directory-integrated zones On CorpDC4, create a regular backup schedule for the server using the following settings: Items to back up: System State Backup schedule: Once a day at 1:00 AM Backup location: WCorpFiles12\Backup On CorpWDS, create a multicast transmission named 2012 Install using the 2012 Datacenter image. Configure the transmission to start: When 2 clients request the image At 8:00 PM on the current day