our company's internal namespace is westsim.local. this domain has two additional child domains named support.westsim.local and research.westsim.local. due to security concerns, your company's internal network is not connected to the internet. following are the dns servers that you manage for your company: dns1, authoritative for . and westsim.local, ip address = 192.168.1.1 dns2, authoritative for support.westsim.local, ip address = 192.168.2.1 dns3, authoritative for research.westsim.local, ip address = 192.168.3.1 all internal dns domains are active directory-integrated domains. you have configured dns1 with appropriate delegation records for the child zones. how should you configure root hints for dns2 and dns3?