Consider a router that interconnects IPv4 three subnets: Subnet 1, Subnet 2, Subnet 3. Suppose all of the
interfaces in each of these three subnets are required to have the prefix 172.12 /16. Also suppose that Subnet 1 is required to support at least 30000 interfaces, Subnet 2 is to support at least 2000 interfaces, and Subnet 3 is to support at least 10000 interfaces. Provide three network addresses (of the form a.b.c.d/x) that satisfy these constraints.