I don't remember how to do the one in yellow questions explain. please

2 LANs 3 Cork 4 Group Production R&D Management HR LAN VLAN 4 VLAN 2 VLAN 99 VLAN 3 Subnet Subnet Mask 172.31.0.0 255.255.255.128 172.310.128 255.255.255.192 172.31.0.192 255.255.255.224 172.31.0.224 25,.255.255.224 8 LANs 9 Galway 10 Limerick 11 Belfast 12 Subnet Mask 172.31.1.0 255.255.255.128 172.31.1.128 255.255.255.192 172.31.1.192 255.255.255.224 Subnet Subnet 172.31.1.240 255.255.255.252 172.31.1.244 255.255.255.252 13 WANs Subnet Mask 14 Galway-to-Cork 15 Cork-to-Belfast 16 Belfast-to-Limerick 172.31.1.248 255.255.255.252 17 18 Device 19 Galway 20 IP AddressS 172.31.1.241 255.255.255.252NA Subnet Mask Default Gateway Interface so/o/o NA 177.31.1:1:11 255.255.255.128 Sheet1 Ready