Suppose you are contracted to design a subnetted network for an organization with the following requirements:

i$.$ The organization has three departments namely Manufacturing, Promotion and Administration.

ii$.$ Manufacturing has $70$ computers, Promotion $48$ computers and Administration $28$ computers.

iii. All departments are interconnected via WAN links.

iv$.$ The organization purchased a public IP address of $196\mathrm{.}210.\frac{10\mathrm{.}0}{24}$ from an ISP.

Having knowledge of Variable Length Subnetting and IP addressing, perform each of the following tasks to fulfill an organization setup and requirements:

a$.$ Sketch the organizational network topology that connects all of the three mentioned departments.

$(5$ marks$)$

b$.$ By using the table for block sizes and charts that starts with the highest block size subnet, and by showing all the steps; subnet the given network into department networks and WAN links.

$(8$ marks$)$

c$.$ Identify broadcast addresses for each of the organizational networks $($Administration$,$ Promotion, and Manufacturing$).$

$(6$ marks$)$

d$.$ What are the first host addresses for Production, Promotion and Administration subnets?

$(6$ marks$)$