3. IP address assignment (18 points) Assuming a university's starting IP address is 132.170.0.0 (i.e. the first two bytes of the host addresses must be 132.170). The university has three campuses. The downtown campus needs to accommodate 1000 hosts, the main campus needs to accommodate 4000 hosts, and the west campus needs to accommodate 2,000 hosts. Determine the subnet addresses and masks for each campus starting from downtown campus, then main campus and then west campus so that the IP addresses of downtown campus are smaller than the those of main campus and IP addresses of main campus are smaller than those of the west campus. Provide Starting and ending IP addresses for each subnet and CIDR (Classless Inter-Domain Routing) notation for each subnet