Show me the steps to solve$1.$ The main network number for this scenario is $198\mathrm{.}40\mathrm{.}16\mathrm{.}0/24$

a$.$ How many subnets do you need?

Hint: Count the number of links coming out of the routers. Routers that are connected together count as one subnet, such as RA$-$RB$,$ RB$-$RC$,$ RC$-$RD and RD$-$RB$.$

b$.$ How many Bits need to be borrowed to accommodate this new subnet scheme?

c$.$ What is the new Custom Subnet Mask after borrowing the subnet bits?

d$.$ How many Total Subnets will be available after borrowing the subnet bits?

e$.$ How many Usable Hosts are available after borrowing the subnet bits?

f$.$ What is the Block Size$/$Network Increment of all of the new subnets?

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Subnet Network IP

First Host IP

Last Host IP

Broadcast IP