Discovery Exercise $12-1$ ESTIMATED TIME : $20$ minutes OBJECTIVE: Calculate IP subnets. DESCRIPTION: Assuming that your company uses the Class A network $100\mathrm{.}0\mathrm{.}0\mathrm{.}0/8,$ with what subnet mask would you need to configure all computers on the network to divide this network $11$ times to match the company's $11$ departments? How many hosts can you have per network? What are the first five ranges of addresses that you can assign to different departments?