You are a computer network engineer working for private company called SolidRock Sdn. Bhd. This company has been granted with IPv4 address block of 192.119.20.0/24 for its IT operation. The company wants you to create new optimized and integrated subnets including VLANs based on Figure 1. Please note that PC 1 & 2 belong to VLAN A and PC 3 & 4 belong to VLAN B. Show ALL your calculations and design of IP addressing by providing the following answers:

a) New subnet mask for the new subnets arrangement.

b) The ranges of available Internet Protocol (IP) address for each newly created subnets.

c) The total number of usable IP addresses for the new network subnets arrangement.

d) Complete the relevant information in the Table 1 and re-draw the Figure with appropriate labels in the corresponding Figure 1 including the routers network interfaces accordingly (e.g. ETH0, ETH1, etc) and all the VLANs.

Device	Interface	IP Address	Netmask	Gateway Address	Network address
Router1	ETH0
	ETH1
	ETH2
	ETH3
	ETH4
Router2	ETH0
	ETH1
	ETH2
	ETH3
	ETH4
Router3	ETH0
	ETH1
	ETH2
	ETH3
	ETH4
Router4	ETH0
	ETH1
	ETH2
	ETH3
PC1	ETH0
PC2	ETH0
PC3	ETH0
PC4	ETH0
PC5	ETH0
PC6	ETH0
PC7	ETH0
PC8	ETH0

PC6 VPCS VPCS router3-1 router3-4 PC5 router3-2 PC8 router3-3 VPCS VPCS switch3-1 PC2 PC3 PC1 PC4 VPCS VPCS VPCS VPCS PC6 VPCS VPCS router3-1 router3-4 PC5 router3-2 PC8 router3-3 VPCS VPCS switch3-1 PC2 PC3 PC1 PC4 VPCS VPCS VPCS VPCS