• Add security aspects to your network and explain how to emulate a secure network in packet tracer for each of the LANs.  Keep in mind that security can be different for each of the types of LANs.  When you add security, ensure that you  provide a few sentences in your paper describing your approach and how and what type security you added. 
• LAN 1 is a cellular configuration.  The Gateway router can also be configured to support the NAT.  The central office server supports DHCP for the internal LAN.  All gateway routers connect via a serial link and use IPv4 public IP addresses which can be set as a static address.  The IPv4 public addresses should be 172.0.10.1; 172.0.20.1; and, 172.0.30.1, for LAN1, LAN2, and LAN3, respectively.
• LAN 2 is a wireless configuration.  Each device is connected to an access point through a wireless network.  This is a basic service set architecture, so there are no ad hoc wireless connections between devices.  This networked system can use a single router connection between the access points and the Internet.  However, between the access points and the router/gateway, install a switch and a network address translation (NAT) to convert IPv4 private addressing structured network to IPv4 public structured addressing for transfer into the Internet via the router/gateway.  The Smartphone devices must support both data and voice.  You will need to use smartphone devices for the wireless connectivity because straight VoIP phones in Cisco do not support wireless; only PCs and smartphones. All of the internal network addressing is to be done by DHCP.  Incorporate WiFi security into your network.
• LAN 3 is a wired system that has a wireless router. Connect the three VoIP phones in series with the three computers.  The three laptops are connected via the wireless router.  Segregate the wireless router and the wired system phones/PCs using a switch.  The internal IPv4 addresses need to be assigned via DHCP, however, the public IPv4 protocols are static.  You will need a vlan.