Assume you have purchased a public IPv4 as follows: 10.13.15.1/24. Now your organization has 5 departments. You need to create a subnets for each of the departments with following requirements: Subnet 1: 20 hosts Subnet 2: 50 hosts Subnet 3: 100 hosts Subnet 4: 250 hosts Subnet 5: 180 hosts a) For each subnet, determine the subnet mask, network address(first address in the subnet), broadcast address (last address in the subnet), and range of usable host addresses. (10 points) b) Create a table that lists the subnet number, subnet mask, network address, broadcast address, and range of usable host addresses for each subnet. (5 points) c) Calculate the total number of subnets and hosts available after subnetting. (5 points) d) Can someone from any corner of the world initiate communication with the hosts of the departments? If yes, then explain why. If not, explain why? (10 points).