I have an assignment but I am wondering that how to start please could any one assist me regarding this? question is mentioned below 

"You are a Network and security engineer for the XYZ Consulting Corporation, which is a leading network designer and security provider for the small-scale offices. As the Network and security engineer you are required to perform the following tasks"

Propose a network design for small scale office (Ex: Business type, departments, building plan).

 You are free to assume the name of the office and number of staffs

 ➢ Purpose of the Project

 ➢ Network overview (ex: connecting PCs, subnetworks, servers or wi-fi networks) • Explain briefly about the device used.