1) (25 pts) Consider the use of the Classless Interdomain Routing (CIDR). Let there be a network PQR that requires the support of "N" hosts. Choose contiguous class network address spaces starting from 212.45.Y.O, (choose an appropriate value of Y based on the thumb rule). Compute the following for network PQR: (1) Subnet mask (2) Network address (3) Broadcast address (4) Range of valid IP addresses (5) Efficiency of IP address assignment. (6) Identify the class C network address spaces required. . "N" hosts 3200