$\backslash$table$[[$Device$,$Interface,IP address,Subnet Mask,Default Gateway$],[$R$1,$Fa$0/0,10\mathrm{.}0\mathrm{.}0\mathrm{.}1,255\mathrm{.}0\mathrm{.}0\mathrm{.}0,$N$/$A$],[$Fa$1/0,220\mathrm{.}0\mathrm{.}0\mathrm{.}2,255\mathrm{.}255\mathrm{.}255\mathrm{.}0,$N$/$A$],[$Se$2/0,30\mathrm{.}0\mathrm{.}0\mathrm{.}1,255\mathrm{.}0\mathrm{.}0\mathrm{.}0,$N$/$A$],[$R$2,$Fa$0/0,130\mathrm{.}0\mathrm{.}0\mathrm{.}4,255\mathrm{.}255\mathrm{.}0\mathrm{.}0,$N$/$A$],[$Fa$1/0,150\mathrm{.}1\mathrm{.}0\mathrm{.}1,255\mathrm{.}255\mathrm{.}0\mathrm{.}0,$N$/$A$],[$Se$2/0,30\mathrm{.}0\mathrm{.}0\mathrm{.}2,255\mathrm{.}0\mathrm{.}0\mathrm{.}0,$N$/$A$],[$PC$1,$NIC,DHCP$,$DHCP$,$DHCP$],[$PC$2,$NIC,DHCP$,$DHCP$,$DHCP$],[$PC$3,$NIC,DHCP$,$DHCP$,$DHCP$],[$PC$4,$NIC,DHCP$,$DHCP$,$DHCP$],[$PC$5,$NIC,DHCP$,$DHCP$,$DHCP$],[$PC$6,$NIC,DHCP$,$DHCP$,$DHCP$],[$PC$7,$NIC,DHCP$,$DHCP$,$DHCP$],[$PC$8,$NIC,DHCP$,$DHCP$,$DHCP$],[$DNS Server,NIC,$130\mathrm{.}0\mathrm{.}0\mathrm{.}135,255\mathrm{.}255\mathrm{.}0\mathrm{.}0,130\mathrm{.}0\mathrm{.}0\mathrm{.}4]]$

Study the diagram and answer question $1$ and $2$:

R$2$ is now set to be the DHCP server to provide IP address for all PC$1$ to PC$8.$ The first $12$ usable IP addresses of the networks are reserved for static IP addresses. Use the pool name LAN$\_$A for the network $10\mathrm{.}0\mathrm{.}0\mathrm{.}0,$ LAN$\_$B for the network $130\mathrm{.}0\mathrm{.}0\mathrm{.}0$ and LAN$\_$C for the network $220\mathrm{.}0\mathrm{.}0\mathrm{.}0.$ Also include default gateway and DNS server in the DHCP assignment.

a$.$ Besides the first $12$ usable IP addresses of each network, there is one more IP address should be excluded from DHCP pool based on the information given. What is it$?$

b$.$ Write the commands on R$2$ to set up the DHCP server based on the requirement. Also consider part $($a$)$ answer.

c$.$ Assume your command typed on R$2$ is correct, it is found that not all PCs can get the IP addresses from DHCP$.$

i$.$ Which PCs cannot get the IP address?

ii$.$ What is the reason for this issue from the lab experience?

iii. Write down commands to solve the problem.