$60$ subnets for its Class B address: $152\mathrm{.}30\mathrm{.}0\mathrm{.}0/16.$

$1.$ How many bits must be borrowed from host portion of the original subnet mask and make them network portion bits?

$2.$ The reallocation of bits changes the subnet mask from $255\mathrm{.}255\mathrm{.}0\mathrm{.}0$ to

$?($use decimal dotted notation$)$

$3.$ To calculate the number of host address for each subnet, just subtract the number of network portion bits from the total number of $32$ bits in an IP address. The results is the number of bits left for the host portion.

In this case, how many bits are in the host portion for each subnet?

How many usable host IP addresses in each subnet?