Consider the router and the three attached subnets in Fig. $2($A$,$ B$,$ and C$).$ The number of hosts is also shown below. The subnets share the $23$ high$-$order bits of the address space: $192\mathrm{.}168\mathrm{.}198\mathrm{.}0/23.$

a$.$ Assign subnet addresses to each of the subnets $($A$,$ B$,$ and C$)$ so that the amount of address space assigned is minimal, and at the same time leaving the largest possible contiguous address space available for assignment if a new subnet were to be added. Then answer the questions below.

b$.$ What is the subnet address of subnet A$?$

c$.$ What are the first and last addresses of subnet A$?$

d$.$ What is the broadcast address of subnet A$?$