Homework 2 (Chapter 4). An ISP has purchased address domain 200.100.0.0/20. If this ISP has 5 customers who want 120, 350, 68, 623 and 128 addresses, respectively. Answer the following qustions. - Specify the address space required for each customer. Address space means determining the network mask along with determining the start and end address of each network. After assigning the address to these customers, how many free addresses are left to the ISP? Tip: To determine the range of customer addresses, start with customers who want more addresses and then allocate address space to customers with fewer addresses