You need to prevent members of the TempWorkers group from accessing the confidential data on the file servers
You need to create a password policy for the engineering department that is different from your domain password policy
You need to prevent the domain controller from registering Host (A) records for the 10.10.10.5 IP address
You need to ensure that the computers in nwtraders.com can update their Host (A) records on any of the DNS servers in the forest