Write a network proposal for a small company + design on packet tracer - school project

Hello! I want you to design a network for a small company on packet tracer, no ip configuration will be necessary, just design representation. After that you have to describe the benefits of using this services, basically its a small company, i want it to have a server. one computer will be the administrator and will be able to access all other computers on the network. Plus: I want to implement VPN, so that the admin access remotely all the computers while not at work, and also i would like to have some kind of backup system, maybe a SAN (Sorry if i am wrong - Not a network guy) so everything can be backup up Office area : Area 1 (Executive) - Admin 1 computer + 3 computer for other executives; Area 2 (Employees) - 5 Computers Area3 (Employees) - 5 computers Please don't forget to use routers, switches, and shared printers, its a school project i have to submit in 3 Hours. The Representation on Packet tracer its just design, not necessary to configure its, etc... But if you can suggest which ip to use would be good.