subnet the following hosts based on number of hosts from the biggest to the smallest hosts and find out the following for each one : network address, CIDR, subnet mask, First IP address, Last IP address, broadcast address, number of needed hosts and number of usable hosts.

use the following IP address: $176\mathrm{.}20\mathrm{.}0\mathrm{.}0$

$1.$ North America:

$$ City:

New York : $150$

Toronto : $90$

$2.$ Europe:

$$ City:

London:$120$

Berlin:$80$

$3.$ Asia$-$Pacific:

$$ City:

Tokyo : $180$

Sydney:$110$

$4.$ Middle East

$$ City:

Manama : $220$

Dubai : $120$

this is the order for the hosts from biggest to smallest: Manama : $220$ Tokyo : $180$ New York : $150$ Dubai : $120$ London:$120$ Sydney:$110$ Toronto : $90$ Berlin:$80$