create the addressing scheme of a Local Area Network (LAN) using the range 172.20.30.0/24, apply your addressing scheme to the interfaces of the computers and routers and configure routing between routers so all computers can be reached from any point in the entire network. Your scheme must take into account the following parameters: You must create one separate subnet for each of the following groups. Marketing with 57 users Accounting with 26 users Server blocks with 15 servers 4 Segments for the backbone links between the routers (you may use a different internal network range for the backbone). Write down your results in the table below. Use optimal subnets. Network Marketing Accounting Server block Backbone 1 Backbone 2 Backbone 3 Backbone 4 1st address Last Address Address Address Address Address Address Address Address Address Address Address Address Address Address Address Subnet Mask Default Gateway Address Address Address Address Address Address Address Address Address Address None None None None: