A website hosted on a single server becomes so popular that the site administrators

decide to replace the single server with two sets of $253$ servers as shown below. Each

set of servers is connected to the Internet by two different routers A and B$.$ Both

routers are connected to the Internet via a router that you manage. The administrators

of Router A assign IP addresses to the first set of servers from the range $107\mathrm{.}21\mathrm{.}41\mathrm{.}2$ ~

$107\mathrm{.}21\mathrm{.}41\mathrm{.}254.$ Similarly, the administrators of Router A assign IP addresses to the

second set of servers from the range $107\mathrm{.}21\mathrm{.}17\mathrm{.}2$ ~ $107\mathrm{.}21\mathrm{.}17\mathrm{.}254.$ You decide to

manually insert routing table entries into $$Your Router" to correctly route packets

between the servers and the rest of the Internet.