1) (25 pts) Consider the use of the Classless Interdomain Routing (CIDR). Let there be a network PQR that requires the support of 1023 hosts and we assign contiguous class C network address spaces starting from 202.89.16.0, (choose additional network address spaces, as needed). Compute the following for network PQR: (2) Network address (4) Range of valid IP addresses 1) Subnet mask .(3) Broadcast address (5) Efficiency of IP address assignment. .(6) Identify the class C network address spaces required